Causative Extension (-ish-/-esh-/-z-) in Swahili

In Brief

Swahili often turns a verb into a causative—one that means “cause or enable someone or something to act”—by adding an extension before the final vowel: pika “cook” → pikisha “make or have someone cook,” and enda “go” → endesha “drive; cause to go.” The most productive forms are -ish- and -esh-, but common verbs also show shorter forms such as -sh-, -z-, and -lish-. Learn the pattern, but learn frequent causative verbs as complete words too.

Overview

A causative describes a situation with a causer and a caused participant. The causer starts or permits the event; the other person or thing performs an action or enters a state. English commonly spreads this meaning across separate verbs: “make the child sleep,” “have the mechanic repair the car,” “let the visitors enter,” or “get the class to laugh.” Swahili can package the same relationship into one extended verb.

This B2 pattern is called kauli ya kusababisha. It belongs to the wider Swahili system of verb extensions: elements added to a verb root before its final vowel to change the participants or meaning. Causatives are highly productive, but they are not merely a formal exercise. Many everyday verbs are established causatives whose meanings have become conventional: fundisha “teach,” endesha “drive or operate,” onyesha “show,” rudisha “return something,” and ongeza “add or increase something.”

English does not force you to choose one causative verb shape: “make,” “let,” “have,” and “get” express different degrees of pressure, permission, arrangement, and persuasion. A Swahili causative often leaves that distinction to context. If the exact relationship matters, add words or use a fuller construction rather than expecting the extension alone to mean specifically “force.”

How It Works

Put the extension inside the verb stem

The extension follows the verb root and precedes the final vowel -a. Subject, tense, and object markers continue to appear before the extended stem.

Structure	Swahili form	What it contributes
root + final vowel	pik-a	cook
root + causative + final vowel	pik-ish-a	cause/have someone to cook
subject + tense + object + causative stem	a-li-m-pik-ish-a	he/she made him/her cook

The causative stem then behaves like an ordinary verb. It can take different tenses, negatives, object markers, and moods:

Form	Analysis	Meaning
anawafundisha	a-na-wa-fundish-a	he/she is teaching them
hakuendesha	ha-ku-endesh-a	he/she did not drive
tutamrudisha	tu-ta-m-rudish-a	we will return him/her
umfundishe	u-m-fundish-e	teach him/her; you should teach him/her

In the last form, -e is the final vowel of the subjunctive (a verb form often used for requests, purposes, wishes, or required actions). It replaces the final -a; it does not replace the causative extension.

Choosing -ish- and -esh-

The broad pattern follows vowel harmony: the vowels of the root influence the vowel in the extension. Roots whose final relevant vowel is a, i, or u commonly take -ish-, while roots with e or o commonly take -esh-. This is a strong recognition aid, not a guarantee that every word can be invented mechanically.

Base verb	Causative	Typical meaning
pika	pikisha	make/have someone cook
rudi	rudisha	cause to return; return something
lala	lalisha	put to bed; cause to sleep
cheka	chekesha	make someone laugh
enda	endesha	drive; operate
soma	somesha	cause someone to study; educate

The surface form can be shorter or altered, especially with very common roots. For example, amka “wake up” becomes amsha “wake someone,” kula “eat” becomes lisha “feed,” and kunywa “drink” becomes nywesha “give someone a drink.” Ona “see” has onyesha (also commonly onesha) “show,” while ongeza “add; increase something” illustrates the -z- type named in this concept. These should be memorized as members of word families rather than forced through a single spelling formula.

How the participants change

A non-causative verb may have only the person doing or experiencing the event:

• Mtoto analala. — “The child is sleeping.”
• Wanafunzi wanasoma. — “The students are studying.”

The causative adds a causer and makes the original subject the causee—the person or thing caused to act:

• Mama anamlalisha mtoto. — “The mother is putting the child to sleep.”
• Mwalimu anawasomesha wanafunzi. — “The teacher is making/helping the students study.”

The causer is now the grammatical subject (the participant matched by the subject prefix). The causee commonly behaves like the object and may be represented by an object marker such as -m- “him/her” or -wa- “them.” In Mama anamlalisha mtoto, a- agrees with Mama, while -m- points to mtoto.

When the base verb already has an object, the causative can introduce another participant:

• Juma anapika chakula. — “Juma is cooking food.”
• Asha anampikisha Juma chakula. — “Asha is having Juma cook food.”

Here Asha is the causer, Juma is the causee, and food remains the thing cooked. Because multiple participants can make a sentence heavy or ambiguous, speakers often use an object marker for the human causee and state the other noun explicitly. Context and natural usage matter; do not assume that English word order can be copied directly.

Meaning ranges from direct force to practical arrangement

The extension itself marks causation, not one fixed social relationship.

Reading	Example	Natural English equivalent
direct physical result	Alimwangusha.	He/she made him/her fall; knocked him/her down.
instruction or pressure	Alimpikisha chakula.	He/she made him/her cook the food.
service or arrangement	Nilishona shati. / Nilishonisha shati.	I sewed a shirt. / I had a shirt sewn.
enabling or helping	Mwalimu aliwasomesha.	The teacher enabled/helped them to study; educated them.
lexicalized activity	Anaendesha gari.	He/she is driving a car.

English learners should therefore resist translating every causative with “make.” Ninaendesha gari is normally just “I am driving a car,” not the unnatural “I am making a car go.”

Examples in Context

Swahili	English	Note
Mwalimu anawafundisha watoto.	The teacher is teaching the children.	Fundisha is an established causative-based verb.
Alimpikisha kazi.	He/she made him/her cook.	Supplied core example; the context presents the action as forced.
Ninaendesha gari.	I am driving a car.	Literally built on the idea “cause to go.”
Mama alimlalisha mtoto.	The mother put the child to sleep.	Lala becomes lalisha.
Habari hiyo ilituchekesha.	That news made us laugh.	The thing causing the reaction is the subject.
Tafadhali mwamshe mtoto saa moja.	Please wake the child at seven.	Amsha is the short causative of amka.
Bibi anamlisha mtoto uji.	Grandmother is feeding the child porridge.	Kula becomes lisha.
Muuguzi alimnywesha mgonjwa maji.	The nurse gave the patient water to drink.	Kunywa becomes nywesha.
Tutamrudisha mgeni hotelini.	We will take the guest back to the hotel.	Rudi is intransitive; rudisha takes an object.
Ongeza sukari kidogo.	Add a little sugar.	Common -z- causative-type verb.
Picha hii inanikumbusha nyumbani.	This picture reminds me of home.	Kumbusha causes someone to remember.
Meneja aliendesha mkutano vizuri.	The manager conducted the meeting well.	Endesha extends beyond vehicles.
Wazazi walimsomesha hadi chuo kikuu.	The parents educated him/her through university.	Often implies supporting or arranging education.
Fundi atatengeneza mashine, lakini meneja ataitengenezisha kesho.	The technician will repair the machine, but the manager will have it repaired tomorrow.	The second verb highlights arranging for another person to do it.

Common Mistakes

Adding the extension after the final vowel

• Wrong: pikaisha
• Right: pikisha
• Why: The causative is inserted into the stem before the final -a: pik-ish-a.

Treating -ish- as the only possible form

• Wrong: endisha for “drive”
• Right: endesha
• Why: Vowel harmony favors -esh- here, and endesha is the established word. Common shortened forms such as amsha and lisha must also be learned individually.

Translating every causative as “force”

• Misleading: Wazazi walimsomesha = “The parents forced him/her to study.”
• Better: “The parents educated him/her” or “paid for/enabled his/her schooling,” depending on context.
• Why: A causative can express force, help, permission, arrangement, or simply a conventional activity. The surrounding situation supplies the nuance.

Losing track of the causee

• Wrong intended meaning: Asha alipika chakula for “Asha had Juma cook the food.”
• Right: Asha alimpikisha Juma chakula.
• Why: The non-causative says Asha cooked it herself. The causative and -m- introduce Juma as the person caused to cook.

Keeping -a where the subjunctive needs -e

• Wrong: Nataka umfundisha mtoto.
• Right: Nataka umfundishe mtoto.
• Why: After nataka in this meaning, the following requested action uses the subjunctive final vowel -e. The causative element remains: fund-ish-e.

Inventing forms without checking usage

• Risky strategy: attaching -isha to every familiar verb and assuming the result is standard.
• Better strategy: recognize the productive pattern, then verify unfamiliar forms in a reliable dictionary or corpus.
• Why: Sound changes, inherited forms, and lexicalized meanings make common causatives less predictable than the basic rule suggests.

Usage Notes

Causatives occur in both speech and formal writing. Established verbs such as fundisha, onyesha, rudisha, and endesha do not sound technical or unusually formal. In many contexts speakers process them as ordinary vocabulary, even though their historical or grammatical structure remains visible.

With people, the difference between making, allowing, helping, and arranging can affect politeness. The bare causative may be clear in context, but it does not always state whether the causee acted willingly. If that distinction matters, make it explicit with surrounding language. For example, a request, an adverb, or a fuller clause can show persuasion, permission, or coercion more precisely.

Some causatives develop meanings that are narrower than a word-for-word analysis suggests. Endesha can mean “drive,” “operate,” “run,” or “conduct”; fundisha means “teach,” not merely any act of causing knowledge; and rudisha often means “put back,” “take back,” or “give back.” A dictionary meaning and a real sentence are safer guides than a literal gloss.

Variation also occurs in accepted spellings and forms, especially in widely used words such as onyesha/onesha. Prefer the form used in your learning materials or the standard variety you are writing in, while learning to recognize common alternatives.

Beyond the Basics / Advanced Use

Causative versus a separate clause

A causative extension presents the caused event as one compact action. A construction with another verb and a following clause can give the two actions more independence or make intention and force clearer. Compare the compactness of alimlalisha mtoto “put the child to sleep” with a fuller statement describing what the adult did so that the child would sleep. Advanced fluency includes choosing between lexical compactness and explicit explanation.

Causatives of adjectives and states

The productive idea is not limited to visible actions. A causative may mean bringing about a quality or state. For instance, word families can contrast becoming a certain way with making something become that way. This is why the best guiding question is not only “Who made whom do it?” but also “What caused this new state?”

Combining extensions

A causative can occur with other verb extensions, including the applied extension (which adds a beneficiary, purpose, or related participant), reciprocal forms, and passive forms. The resulting stem may express ideas such as “have something done for someone” or “be caused to do something.” For example, somesha can form the passive someshwa, “be educated/be caused to study.”

These combinations are powerful but structurally denser. Analyze them from the root outward, identify each extension, and only then add subject, tense, and object markers. The order of extensions is not freely interchangeable, and some established words do not behave as if assembled by a simple formula. Combined extensions are therefore best studied as their own next topic.

Lexical causatives versus newly formed causatives

There is a useful continuum. At one end are transparent pairs such as cheka → chekesha. At the other are forms like fundisha and endesha, whose everyday English equivalents no longer sound causative. Between them are productive forms that a speaker may create in a suitable context. Recognition can develop faster than production: you may correctly infer a new word while still needing to check whether speakers normally use it.

Practice Tips

1. Build word-family pairs. Make two columns with base verbs and causatives: lala/lalisha, rudi/rudisha, cheka/chekesha, amka/amsha. Add one sentence for each member so that you practice the participant change, not just the spelling.
2. Label the roles. In every causative sentence, mark the causer, causee, and—if present—the original object. Then locate the matching subject and object markers inside the Swahili verb.
3. Translate for meaning, then check form. First choose natural English—“drive,” “teach,” “feed,” or “have repaired”—instead of automatically using “make.” When producing Swahili, verify unfamiliar causative stems rather than relying on -isha alone.

Related Concepts

• Prerequisite: Applied/Prepositional Extension (-i-/-e-/-li-/-le-) — introduces another productive extension and the way an extended verb adds a participant.
• Next step: Combined Verb Extensions — shows how causative, applied, reciprocal, passive, and other extensions interact within one verb stem.