Ergative Case in Basque

In Brief

Basque marks the subject of a transitive verb—a verb acting on a direct object—with the ergative case, traditionally called NORK (“who by?”). A definite singular noun usually ends in -ak, while a definite plural noun ends in -ek: Amak ogia erosi du (“Mother bought bread”), but Gurasoek ogia erosi dute (“The parents bought bread”). The object does not take the ergative; it normally remains in the absolutive case (NOR).

Overview

A case is a change in the form of a noun or pronoun that shows its role in a sentence. English mostly relies on word order: in “the mother sees the child,” the first noun is understood as the subject and the second as the object. Basque also uses word order, but case endings make these roles visible. The ergative ending identifies the subject of a verb that has a direct object.

This is one of the central patterns introduced at A1. Compare Mutila etorri da (“The boy came”) with Mutilak atea ireki du (“The boy opened the door”). In the first sentence, etorri (“come”) has no direct object, so mutila is absolutive. In the second, ireki (“open”) acts on atea (“the door”), so the subject becomes ergative: mutilak.

Basque is therefore described as an ergative–absolutive language. In plain terms, the subject of an intransitive verb (a verb with no direct object) is marked in the same way as the object of a transitive verb. The subject of the transitive verb receives the special ergative marking. Basque school grammar labels these roles NOR (absolutive) and NORK (ergative).

How It Works

Start by finding the verb and its object

Use this beginner procedure:

1. Find the main verb.
2. Ask whether someone or something performs that verb on a direct object—the person or thing directly affected.
3. If there is a direct object, mark the subject with NORK, the ergative case.
4. Keep the direct object in NOR, the absolutive case, and choose a transitive auxiliary such as du or dute.

The basic pattern is:

ERGATIVE SUBJECT + ABSOLUTIVE OBJECT + VERB + TRANSITIVE AUXILIARY

In Irakasleak liburua eman du, irakasleak is the giver, liburua is the thing given, eman is the main verb, and du is the auxiliary. Basque word order can change for focus, but the endings continue to identify the roles.

Definite noun endings

The clearest A1 pattern uses definite nouns—nouns referring to a specific or contextually identifiable person or thing.

Number	Absolutive (NOR)	Ergative (NORK)	Meaning
Singular	mutila	mutilak	the boy
Plural	mutilak	mutilek	the boys
Singular	irakaslea	irakasleak	the teacher
Plural	irakasleak	irakasleek	the teachers

A crucial warning is visible here: -ak is ambiguous by itself. It can be the ergative singular (mutilak, “the boy” as transitive subject) or the absolutive plural (mutilak, “the boys” in another role). The verb, auxiliary, and surrounding sentence resolve the meaning:

• Mutilak etorri dira. — “The boys came.” Here mutilak is absolutive plural, and plural dira confirms it.
• Mutilak ogia erosi du. — “The boy bought bread.” Here mutilak is ergative singular, and singular-agent du fits the sentence.

For the core pattern, remember definite singular -ak and definite plural -ek. Indefinite noun phrases, names, and phrases with determiners have their own surface forms; they are discussed below rather than forced into this simple two-ending rule.

Personal pronouns

Pronouns do not form the ergative merely by adding -ak or -ek. Learn their NORK forms as a set.

Person	Ergative form	English
1st singular	nik	I
2nd singular familiar	hik	you
3rd singular	hark	he, she, that person
1st plural	guk	we
2nd singular neutral/polite	zuk	you
2nd plural	zuek	you (plural)
3rd plural	haiek	they

For most beginners, zuk is the normal singular “you.” Hik belongs to the familiar hika system and also affects verb forms, so recognition is more useful than active use at first.

Unlike English, Basque distinguishes the role even in “I”: absolutive ni becomes ergative nik. Thus Ni etorri naiz means “I came,” but Nik hau egin dut means “I did this.”

The auxiliary agrees too

The ending on the noun is only half of the pattern. A finite Basque auxiliary carries information about the participants. At A1, it is useful to learn common subject–object combinations as whole frames.

Frame	Basque	Meaning
I → it	nik ... dut	I ... it
you → it	zuk ... duzu	you ... it
he/she → it	hark ... du	he/she ... it
we → it	guk ... dugu	we ... it
you all → it	zuek ... duzue	you all ... it
they → it	haiek ... dute	they ... it

With a plural object, the auxiliary changes again: Nik liburua irakurri dut (“I read the book”) but Nik liburuak irakurri ditut (“I read the books”). The ergative subject remains nik; ditut now also reflects a plural object. Do not try to derive every auxiliary form from the English translation. Learn the sentence frame and notice both NOR and NORK.

Transitive and intransitive uses

The same event can sometimes be presented with or without an external causer:

Intransitive: NOR	Transitive: NORK + NOR
Atea ireki da. — The door opened.	Anek atea ireki du. — Ane opened the door.
Argia itzali da. — The light went out.	Jonek argia itzali du. — Jon turned off the light.

Do not choose ergative simply because a sentence describes an action. Choose it according to the Basque verb construction: a transitive construction has an absolutive object and an ergative subject.

Examples in Context

Basque	English	Note
Amak ogia erosi du.	Mother has bought bread.	Definite singular subject: ama → amak
Mutilek pilota jo dute.	The boys have hit the ball.	Definite plural subject in -ek
Nik hau egin dut.	I have done this.	Ergative pronoun nik
Irakasleak liburua eman du.	The teacher has given the book.	Irakasleak acts on liburua
Guk afaria prestatu dugu.	We have prepared dinner.	The frame is guk ... dugu
Zuk kafea edan duzu.	You have drunk the coffee.	Neutral singular “you”: zuk
Haiek etxea garbitu dute.	They have cleaned the house.	The frame is haiek ... dute
Haizeak atea ireki du.	The wind has opened the door.	The subject need not be human or intentional
Mutilak etorri dira.	The boys have arrived.	Mutilak is absolutive plural, not ergative
Mutilak pilota ekarri du.	The boy has brought the ball.	Here mutilak is ergative singular
Anek gutuna idatzi du.	Ane has written the letter.	A personal name takes an ergative form
Nik liburuak irakurri ditut.	I have read the books.	Plural object changes the auxiliary to ditut

Common Mistakes

Marking every subject with the ergative

• Wrong: Mutilak etorri da.
• Right: Mutila etorri da.
• Why: Etorri (“come”) is intransitive here: there is no direct object. Its subject is NOR, not NORK.

Leaving a transitive subject in the absolutive

• Wrong: Ama ogia erosi du.
• Right: Amak ogia erosi du.
• Why: Mother performs erosi (“buy”) on the object ogia, so the subject must be ergative.

Treating every -ak form as plural

• Wrong interpretation: Irakasleak liburua eman du = “The teachers gave the book.”
• Right interpretation: “The teacher gave the book.”
• Why: -ak can mark ergative singular or absolutive plural. Here the transitive structure and du point to one teacher acting on the book.

Changing the noun but not the auxiliary

• Wrong: Mutilek pilota jo du.
• Right: Mutilek pilota jo dute.
• Why: Mutilek is a plural ergative subject, so the auxiliary must also show a plural agent: dute.

Copying English subject logic

• Wrong: using ni in Ni hau egin dut.
• Right: Nik hau egin dut.
• Why: English “I” stays the same in both “I came” and “I did this.” Basque changes ni to ergative nik when it is the subject of a transitive construction.

Usage Notes

The ergative ending does not mean “deliberate doer.” An inanimate cause can be ergative, as in Haizeak atea ireki du (“The wind opened the door”), and a person can be grammatically ergative even when the action is accidental. “Doer” is a useful first shortcut, but “subject of a transitive construction” is the more reliable rule.

Basque often places focused information before the verb, so NORK does not have to be the first phrase. Ogia amak erosi du can highlight that it was Mother who bought the bread. Case marking and auxiliary agreement preserve the roles when the order changes. Beginners should first produce the neutral subject–object–verb order, then learn to recognize alternatives.

Names also decline. Common forms include Anek and Jonek. Do not attach the definite singular -ak mechanically to every name: name endings follow the proper-name declension pattern. Determiners such as demonstratives and question words likewise carry the case marking for the whole noun phrase; this is why forms such as hark and nork should be learned directly.

Beyond the Basics / Advanced Use

You do not need to master all of this at A1, but the simple “subject in -ak/-ek” rule expands in several important ways.

First, Basque agreement is polypersonal: one auxiliary can reflect more than one participant. Compare dut (“I have it”), ditut (“I have them”), du (“he/she has it”), and dute (“they have it”). Later you will also meet auxiliaries that include a recipient or other dative participant, the role called NORI: Irakasleak ikasleari liburua eman dio (“The teacher gave the student the book”). Here irakasleak is NORK, liburua is NOR, and ikasleari is NORI.

Second, transitivity belongs to the Basque construction, not automatically to an English verb. A dictionary and a good example sentence tell you which auxiliary a Basque verb selects. Some verbs can alternate between transitive and intransitive patterns with a change in meaning or viewpoint, as with atea ireki da versus Anek atea ireki du. Other predicates do not map neatly onto the English labels “subject” and “object.” Learn new verbs together with a short frame such as nor etorri da? or nork zer egin du?

Finally, the ergative can appear on an entire noun phrase rather than as a visible ending on each word. Basque case marking normally occurs at the right edge of the phrase. In mutil gazteak egin du (“the young boy did it”), the NORK marking belongs to the whole phrase mutil gazteak. This phrase-level behavior becomes especially important with adjectives, demonstratives, numbers, and longer noun phrases.

Practice Tips

1. Build sentence pairs. Take an intransitive sentence such as Atea ireki da and add a cause: Anek atea ireki du. Say aloud which phrase is NOR and which is NORK.
2. Learn frames, not isolated endings. Drill nik ... dut, zuk ... duzu, hark ... du, guk ... dugu, and haiek ... dute with one singular object. Then replace that object with a plural one and notice the auxiliary change.
3. Test every -ak form in context. When reading, ask whether it could be absolutive plural or ergative singular. Use the verb’s transitivity and the auxiliary—not the ending alone—to decide.

Related Concepts

• Prerequisite: Absolutive Case — learn the NOR form used for intransitive subjects and transitive objects before contrasting it with NORK.