The Definite Article in Irish

In Brief

Irish uses an with singular nouns and na with plural nouns to mean “the”: an fear (“the man”), an bhean (“the woman”), and na leabhair (“the books”). There is no separate word for English “a” or “an.” The article can change the beginning of the noun, so learn each noun together with its article form.

Overview

The definite article points to a particular person or thing: “the man,” “the book,” or “the houses.” Irish calls it an t-alt. Unlike English, Irish does not always leave the following noun unchanged. Its first sound may undergo a mutation (a regular change at the beginning of a word), or it may acquire a prefix such as t-, h-, or n-.

This is an A1 topic because an and na appear in even the simplest conversations. The beginner pattern is manageable: use an for one and na for more than one, then notice the common changes in an bhean, an t-uisce, and na húlla. These changes also give useful clues about a noun’s gender and grammatical role.

English-speaking learners have two habits to unlearn. First, English “a/an” has no direct Irish equivalent: a bare noun can be indefinite. Second, “the” is not simply one unchanging word placed before a noun. Irish spelling records sound changes that English does not make.

How It Works

The beginner rule

A noun is a word for a person, place, thing, or idea. In the simplest subject forms, use:

Number	Article	Basic pattern	Meaning
Singular	an	an fear	the man
Plural	na	na fir	the men
Indefinite singular	no article	fear	a man
Indefinite plural	no article	fir	men / some men

Irish nouns have grammatical gender: they are classed as masculine or feminine. This does not always match biological sex. Gender matters most visibly after an in the nominative singular—the ordinary form used, for example, for the subject of a sentence.

Singular nouns beginning with a consonant

A masculine singular noun normally remains unchanged after an:

• fear → an fear (“the man”)
• bord → an bord (“the table”)
• leabhar → an leabhar (“the book”)

A feminine singular noun normally undergoes lenition (séimhiú), which is often written by adding h after its first consonant:

• bean → an bhean (“the woman”)
• fuinneog → an fhuinneog (“the window”)
• cathair → an chathair (“the city”)

The common lenitable initials are b, c, d, f, g, m, p, s, t, but the article has special restrictions. After singular an, d and t do not lenite: an deoch (“the drink”), an tine (“the fire”). An initial s followed by a vowel or by l, n, r takes t instead of ordinary lenition in the relevant article pattern: sráid → an tsráid (“the street”), súil → an tsúil (“the eye”). There is no hyphen in these ts forms.

Not every consonant can be lenited. Words beginning with l, n, or r simply keep that initial: an lámh (“the hand”), an nóiméad (“the minute”).

Singular nouns beginning with a vowel

A masculine singular noun beginning with a vowel receives t- after an:

• uisce → an t-uisce (“the water”)
• athair → an t-athair (“the father”)
• arán → an t-arán (“the bread”)

The hyphen is written before a lowercase vowel. This t- is not part of the dictionary form: look up uisce, not tuisce.

A feminine singular vowel-initial noun does not take this t- in the basic nominative pattern:

• oíche → an oíche (“the night”)
• obair → an obair (“the work”)

This contrast is useful, but do not guess gender from one isolated form unless you know which grammatical pattern you are seeing.

Plural nouns

The ordinary plural article is na, regardless of gender. Before a consonant, the noun normally keeps its beginning:

• na leabhair (“the books”)
• na mná (“the women”)
• na tithe (“the houses”)

Before a vowel, h is added:

• úlla → na húlla (“the apples”)
• éin → na héin (“the birds”)
• oícheanta → na hoícheanta (“the nights”)

Unlike t- and n-, this prefixed h is written without a hyphen.

No indefinite article

Irish has no word that corresponds exactly to English indefinite a/an. Use the noun without an article:

• Tá madra sa ghairdín. — “There is a dog in the garden.”
• Tá carr agam. — literally “A car is at me,” meaning “I have a car.”
• Is múinteoir í. — “She is a teacher.”

A bare noun is not automatically definite. Context tells you whether English needs “a,” “an,” “some,” or no article at all.

A compact reference table

Form and role	Article pattern	Example	Meaning
Nominative singular, masculine consonant	an + basic form	an fear	the man
Nominative singular, feminine lenitable consonant	an + lenition	an bhean	the woman
Nominative singular, masculine vowel	an t-	an t-uisce	the water
Nominative singular, feminine vowel	an + vowel	an oíche	the night
Nominative plural, consonant	na + basic form	na leabhair	the books
Nominative plural, vowel	na h-	na húlla	the apples

The labels above describe the forms beginners meet first. Later, the article changes with the genitive case (a form often expressing “of”) and after prepositions. Those patterns are explained under Advanced Use.

Examples in Context

Irish	English	Note
Tá an fear anseo.	The man is here.	Masculine singular consonant
Tá an bhean sa siopa.	The woman is in the shop.	Feminine b is lenited
Tá an fhuinneog oscailte.	The window is open.	Feminine f is lenited; fh is silent
Tá an t-uisce fuar.	The water is cold.	t- before a masculine vowel
Bhí an oíche ciúin.	The night was quiet.	Feminine vowel, with no t-
Tá an tsráid gnóthach.	The street is busy.	Feminine s takes t
Tá na leabhair ar an mbord.	The books are on the table.	Plural na; later ar an causes eclipsis
Tá na húlla sa chiseán.	The apples are in the basket.	h before a plural vowel
Cheannaigh mé carr.	I bought a car.	No indefinite article
Is dochtúir é.	He is a doctor.	Profession without an indefinite article
Dath an chairr.	The color of the car.	Masculine genitive singular with lenition
Doras na scoile.	The door of the school.	Feminine genitive singular uses na
Ainmneacha na bhfear.	The men’s names.	Genitive plural with eclipsis
Tá sí ag an bhfuinneog.	She is at the window.	Article after a preposition; standard eclipsis

Common Mistakes

Using an Irish word for English “a”

• Wrong: Tá an madra sa ghairdín. when you mean “There is a dog in the garden.”
• Right: Tá madra sa ghairdín.
• Why: An means “the,” not “a/an.” Irish normally uses a bare noun for an indefinite meaning.

Leaving a feminine noun unchanged

• Wrong: an bean
• Right: an bhean
• Why: A lenitable feminine noun is normally lenited after an in the basic singular form. Learn bean — an bhean as a pair.

Adding t- to every vowel

• Wrong: an t-oíche
• Right: an oíche
• Why: In the basic singular pattern, t- before a vowel marks a masculine noun. Oíche is feminine.

Forgetting h- in the plural

• Wrong: na úlla
• Right: na húlla
• Why: Plural na prefixes h to a vowel-initial noun. Write it directly against the word, without a hyphen.

Treating every s like an ordinary lenitable consonant

• Wrong: an shráid
• Right: an tsráid
• Why: In this pattern, feminine s followed by a vowel or l, n, r takes t, not sh.

Assuming the article always has the same form

• Wrong: doras an scoil for “the door of the school”
• Right: doras na scoile
• Why: “Of the school” uses a genitive form. Feminine singular nouns use na in that pattern, and the noun itself may change form.

Usage Notes

The written forms taught here belong to the standard language, An Caighdeán Oifigiúil. Pronunciation and mutation patterns after a preposition plus the article vary across dialects. You may therefore hear a form with lenition where the standard written pattern uses eclipsis. This is normal regional Irish, not careless speech.

Article use does not map word for word onto English. Irish often uses the article in familiar body-part and possession expressions where an English translation may use a possessive: Tá pian sa cheann agam means “I have a pain in my head,” literally with “the head.” Place names and fixed phrases also have their own conventional article use, so copy the established form rather than translating “the” automatically.

Remember that a mutation belongs to the whole grammatical phrase. In an bhean, the dictionary entry remains bean. In na húlla, the plural noun remains úlla. This matters when looking up vocabulary and when making flashcards.

Beyond the Basics: Case and Prepositions

You do not need to master this section at A1, but these forms are frequent enough that you will soon recognize them. Irish preserves different article patterns according to case—the form a noun phrase takes because of its job in the sentence.

The genitive singular

The genitive often corresponds to English “of” or a possessive ending:

• masculine singular: an plus lenition where possible — hata an fhir (“the man’s hat”), from fear
• feminine singular: na without lenition of an initial consonant — doras na scoile (“the school’s door”), from scoil
• feminine vowel-initial nouns after na take h- — deireadh na hoíche (“the end of the night”)

The noun may also change internally or at its ending: fear becomes fir, and scoil becomes scoile. Those changes belong to noun declension, not to the article alone.

The genitive plural

Genitive plural na causes eclipsis (urú), a mutation in which another consonant is written before the original one:

Basic initial	After genitive plural na	Example
b	mb	na mbád — of the boats
c	gc	na gcat — of the cats
d	nd	na ndoirse — of the doors
f	bhf	na bhfear — of the men
g	ng	na ngairdíní — of the gardens
p	bp	na bpáistí — of the children
t	dt	na dtithe — of the houses

For c, the prefixed letter is g, as in na gcapall; for a noun beginning with g, eclipsis is written ng, as in na ngairdíní (“of the gardens”). A vowel receives n-: na n-éan (“of the birds”). The table’s spelling can look unusual because the original first letter remains visible.

After common prepositions

A preposition is a short linking word such as “at,” “on,” “from,” or “under.” In standard Irish, many simple prepositions followed by singular an cause eclipsis:

• ag an bhfear — “at/by the man”
• ar an mbord — “on the table”
• faoin gcrann — “under the tree”

Several prepositions combine with the article: de + an → den, do + an → don, faoi + an → faoin, ó + an → ón. Sa (“in the”) is used before a consonant and commonly causes lenition, as in sa charr (“in the car”); san appears before a vowel, as in san oifig (“in the office”). Dialect differences are especially noticeable here, so treat forms from fluent speakers in their regional context.

Definite phrases with demonstratives

Irish demonstratives come after the noun. When English says “this book,” Irish commonly builds a definite phrase: an leabhar seo, literally “the book this.” Similarly, an bhean sin means “that woman” and na tithe siúd means “those houses over there.” The article and its mutation remain part of the phrase.

Practice Tips

1. Learn three forms together. For each new noun, record its gender, its article form, and its plural: bean (f.) — an bhean — na mná. This makes mutation practice part of vocabulary learning.
2. Sort by first sound. Make small groups for masculine consonants, feminine consonants, masculine vowels, and plurals beginning with vowels. Say an fear, an bhean, an t-uisce, na húlla aloud until each pattern feels automatic.
3. Translate in both directions. Contrast “the car” (an carr) with “a car” (carr), then add a preposition (sa charr). This prevents the English habit of inserting an article every time.

Related Concepts

• Prerequisite: Lenition (Séimhiú) — explains the initial change in forms such as an bhean.
• Next step: Gender of Nouns — helps you predict whether singular an causes lenition or t-.
• Next step: Demonstratives — builds phrases such as an fear seo and na tithe sin.