Gender of Nouns in Irish

In Brief

Every Irish noun is grammatically masculine or feminine. In the singular, gender is often visible after the definite article an: a masculine noun usually stays unchanged (an fear, “the man”), while a feminine noun beginning with a suitable consonant is lenited (an bhean, “the woman”). Gender also affects adjectives and pronouns, so learn it as part of each new noun.

Overview

A noun is a word for a person, place, thing, or idea, such as fear (“man”), fuinneog (“window”), or sláinte (“health”). Irish assigns every noun a grammatical gender: firinscneach (masculine) or baininscneach (feminine). This classification does not normally describe the real-world qualities of the object. A table is not inherently masculine, but bord is a masculine noun.

Gender matters because Irish words can change at the beginning or end according to the words around them. The definite article (“the”), an adjective describing the noun, and a pronoun referring back to it can all reveal gender. English does not assign “he” or “she” to ordinary objects, so an English-speaking learner cannot reliably guess Irish gender from meaning alone.

This is an A1 foundation topic. The useful beginner habit is simple: learn noun + gender + article form together—bord, masculine, an bord; bean, feminine, an bhean. The main rules come first below. Less predictable patterns and case forms are separated into the advanced section.

How It Works

The core singular pattern

Irish has no equivalent of English “a” or “an”: fear can mean “a man” or simply “man,” depending on context. The singular definite article is an. Before many consonants, it makes the contrast between the two genders visible.

Starting sound or letter	Masculine singular	Feminine singular
Consonant that can be lenited	usually no change: an fear	lenition: an bhean
Vowel	t- is prefixed: an t-uisce	no prefix: an obair
s before a vowel or l, n, r	normally unchanged: an sagart	t replaces the written effect of lenition: an tsráid

Lenition (séimhiú) is an initial mutation—a change at the beginning of a word—usually shown by adding h after the first consonant: b → bh, c → ch, f → fh, m → mh, and so on. Thus bean becomes an bhean, and fuinneog becomes an fhuinneog. The spelling change also changes pronunciation; notably, fh is normally silent.

Not every consonant can show lenition in spelling. Words beginning with a vowel, l, n, or r cannot simply take an added h. The sounds written d and t also resist lenition after the article because of the traditional “dentals rule”: an deoch (“the drink,” feminine) and an tine (“the fire,” feminine). Therefore, an unchanged noun after an is not automatically masculine.

What happens before a vowel

Before a vowel, the beginner contrast runs in the opposite direction from the common consonant pattern:

• masculine: uisce → an t-uisce (“the water”)
• feminine: obair → an obair (“the work”)

The prefixed t- is lowercase and joined with a hyphen before a lowercase vowel. It belongs to the article pattern, not to the dictionary form: look up uisce, not t-uisce.

Feminine nouns beginning with s

A feminine singular noun beginning with s followed by a vowel or by l, n, or r takes t after an. The original s remains in the spelling, giving ts:

• sráid → an tsráid (“the street”)
• súil → an tsúil (“the eye”)

This t is written directly before the noun, without a hyphen. A masculine noun in the same environment normally keeps s: sagart → an sagart (“the priest”).

Gender and adjectives

An adjective is a describing word such as mór (“big”) or maith (“good”). In Irish, it usually follows the noun. In the basic singular nominative form—the form commonly used for the subject of a sentence—a feminine noun normally lenites a following adjective, while a masculine noun does not.

Gender	Noun phrase	Meaning
Masculine	fear mór	a big man
Feminine	bean mhór	a big woman
Masculine	leabhar maith	a good book
Feminine	fuinneog mhór	a big window

The same restrictions that affect lenition elsewhere still matter. Some initials cannot visibly change, and not every adjective has a form that displays the contrast. Gender is therefore clearest when several clues agree; no single surface pattern works for every word.

Gender and pronouns

Irish traditionally uses sé (“he/it”) for a masculine singular noun and sí (“she/it”) for a feminine singular noun. These are pronouns—short words used in place of a noun.

• Tá an bord sa chistin. Tá sé mór. — “The table is in the kitchen. It is big.”
• Tá an fhuinneog oscailte. Tá sí mór. — “The window is open. It is big.”

English uses “it” for both objects, so this link needs deliberate practice. With people, natural or personal gender is also important; grammatical labels should not be used to misgender a person.

Useful clues for guessing gender

Gender should be checked in a dictionary, but common shapes give useful first guesses. A broad consonant is one next to a, o, or u; a slender consonant is one next to e or i.

Tendency	Likely gender	Examples	Caution
Noun ending in a broad consonant	often masculine	bord, bád	a tendency, not a rule
Noun ending in a slender consonant	often feminine	súil	many exceptions exist
Ending -óg or -eog	usually feminine	fuinneog, spúnóg	learn the individual noun
Many names of males or females	often match natural gender	fear, bean	form and tradition can override meaning

A famous warning is cailín (“girl”), which is grammatically masculine: an cailín beag (“the little girl”). Meaning alone is not enough.

Examples in Context

Irish	English	Note
Tá an fear anseo.	The man is here.	fear is masculine; no mutation after an.
Tá an bhean anseo.	The woman is here.	bean is feminine; b is lenited to bh.
Tá an bord sa chistin.	The table is in the kitchen.	bord is masculine.
Tá an fhuinneog oscailte.	The window is open.	Feminine fuinneog becomes fhuinneog.
Tá an t-uisce fuar.	The water is cold.	Masculine vowel-initial noun takes t-.
Tá an obair críochnaithe.	The work is finished.	Feminine vowel-initial noun has no t-.
Tá an tsráid ciúin anocht.	The street is quiet tonight.	Feminine sráid takes t after the article.
Tá an sagart sa séipéal.	The priest is in the church.	Masculine sagart keeps its initial s.
Chonaic mé fear mór.	I saw a big man.	Masculine noun; mór remains unchanged.
Chonaic mé bean mhór.	I saw a big woman.	Feminine noun lenites the adjective.
Tá an fhuinneog mór.	The window is big.	After tá, the predicate adjective mór does not agree by lenition.
Tá an fhuinneog oscailte. Tá sí glan freisin.	The window is open. It is clean too.	sí refers back to feminine fuinneog.
Tá an bord nua. Tá sé sa seomra bia.	The table is new. It is in the dining room.	sé refers back to masculine bord.
Tá an cailín beag ag léamh.	The little girl is reading.	cailín is grammatically masculine despite its meaning.

The contrast between bean mhór and Tá an bhean mór is important. An adjective placed directly after a noun inside one noun phrase agrees with it. A predicate adjective—one that gives information after a verb, as in “the woman is big”—normally stays in its basic form after tá: Tá an bhean mór.

Common Mistakes

Treating every object as neuter

• Wrong: Tá an fhuinneog oscailte. Tá sé mór.
• Right: Tá an fhuinneog oscailte. Tá sí mór.
• Why: Irish has no neuter noun gender in the modern system. Fuinneog is feminine, so traditional pronoun reference uses sí.

Leniting every noun after an

• Wrong: an fhear
• Right: an fear
• Why: A masculine singular consonant-initial noun normally remains unchanged after the article. Feminine bean, by contrast, becomes an bhean.

Forgetting the masculine t- before a vowel

• Wrong: an uisce
• Right: an t-uisce
• Why: A masculine singular noun beginning with a vowel takes t- after an. A feminine vowel-initial noun, such as obair, does not.

Using t- with a feminine vowel-initial noun

• Wrong: an t-obair
• Right: an obair
• Why: The t- pattern before a vowel marks the masculine singular here, not the feminine.

Leniting every adjective near a feminine noun

• Wrong: Tá an bhean mhór. (for “The woman is big.”)
• Right: Tá an bhean mór.
• Why: In bean mhór, the adjective directly modifies the noun and agrees with it. After tá, a predicate adjective normally remains unlenited.

Guessing gender only from meaning

• Wrong: assuming cailín must be feminine because it means “girl”
• Right: an cailín beag
• Why: Grammatical gender is a property of the Irish word. Learn dictionary gender even when the meaning suggests an answer.

Usage Notes

Dictionaries usually mark gender with m. or fir. for masculine and f. or bain. for feminine. A good vocabulary note might read fuinneog (f.), an fhuinneog. Recording the article form is especially useful because it turns an abstract label into a phrase you can say and recognise.

Gender is easiest to hear or see in the singular. In the common nominative plural, the article is na, and the masculine–feminine contrast is often no longer displayed in the same way. Do not assume that a plural phrase will help you recover a noun's gender.

You may encounter variation in speech, especially where traditional grammatical gender competes with natural reference or where dialects preserve different patterns. For learning and careful writing, use the gender and forms given by a reliable dictionary, while remaining open to forms used consistently by native speakers.

Beyond the Basics

You do not need to master this section at A1, but gender continues to operate inside the Irish case system. A case is a form that marks a noun's role or relationship in a phrase. The genitive case, often used for possession or an “of” relationship, can change the noun, the article, and surrounding mutations. For example, the familiar word bean has the genitive form mná in hata na mná (“the woman's hat”).

Traditional grammar groups Irish nouns into declensions—sets of nouns with similar case and plural patterns. The rough beginner clues come largely from these groups: first-declension nouns are mostly masculine and often end in a broad consonant, while second-declension nouns are mostly feminine and often have a slender ending in the basic form. These are powerful patterns, but they are not a substitute for learning a noun's full dictionary entry.

Gender can also become less obvious when the noun is in another case, in the plural, or preceded by a preposition combined with the article. The visible mutation then reflects several rules at once, not gender alone. When you later study such phrases, work backwards: identify the dictionary form, determine number and case, and only then ask what gender contributes.

Some inherited gender assignments do not line up neatly with present-day meaning. Cailín is masculine because of its word formation and grammatical history, not because Irish describes girls as male. This distinction between grammatical gender and a person's identity is essential in real communication.

Practice Tips

1. Learn nouns in three-part chunks. Write bord — m. — an bord and fuinneog — f. — an fhuinneog, rather than memorising the bare noun alone. Include audio so that mutation is a sound pattern, not just an added letter.
2. Sort new nouns by visible test. Make columns for an + unchanged consonant, an + lenition, an t- + vowel, and an + unchanged vowel. Then add one adjective phrase and one pronoun: fuinneog mhór; sí.
3. Practise contrasts aloud. Alternate pairs such as fear mór / bean mhór and an t-uisce / an obair. Finally, check your guesses in a dictionary and mark exceptions rather than trying to force them into a rule.

Related Concepts

• Prerequisite: The Definite Article — explains an, na, and the mutations caused by the article.
• Next step: Basic Adjectives — develops gender agreement after the noun.
• Next step: Plural Formation — shows how noun forms and agreement change in the plural.
• Later study: The Genitive Case — explores gender, declension, possession, and case-dependent mutations.