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Mammal in Irish (Sineach): Meaning, Pronunciation, Usage

The Irish for mammal is sineach, a feminine noun (plural sineacha).
Updated October 2026Report a mistake

How to say “mammal” in Irish

Irish:
sineach
English:
mammal
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“SHIN-akh”  /ʃɪnʲəx/
Various forms
Plural:
sineacha (mammals)
Genitive singular:
siní, na siní (e.g. corp na siní, the body of the mammal)
Genitive plural:
sineach, na sineach (e.g. aicme na sineach, the class of the mammals)

What does “sineach” mean?

mammal
An animal that feeds its young with milk from its body, such as a cow, a dog or a human.Also: mammalian animal, suckling animal.

“Sineach” with the article

The plural of mammal in Irish is sineacha. Here is sineach after the article (an t-alt), in the singular and the plural.

an tsineach
the mammal
Feminine nouns take t before s after an
na sineacha
the mammals
Plural: no change after na

“Sineach” in a sentence: Irish examples

Common Irish sentences using sineach, the Irish word for mammal.

Is sineach í an bhó.
The cow is a mammal.
Is sineacha iad na míolta móra freisin.
Whales are mammals too.
Tugann an tsineach bainne dá hál.
The mammal gives milk to its young.
Tá fionnadh ar fhormhór na sineach.
Most mammals have fur.
D'fhoghlaimíomar faoi shineacha ar scoil inniu.
We learned about mammals at school today.
Cén sineach is mó ar domhan?
What is the biggest mammal in the world?
Tá cuid mhór sineach beag sa choill.
There are lots of small mammals in the wood.

Other nouns in Irish

More everyday Irish nouns to learn next.

Mammal in Irish: frequently asked questions

What is the Irish for mammal?

The Irish for mammal is sineach (pronounced “SHIN-akh”). It’s a feminine noun and the plural is sineacha.

How do you pronounce sineach in Irish?

Sineach is said like “SHIN-akh” (IPA /ʃɪnʲəx/).

What is the plural of mammal in Irish?

The plural of sineach is sineacha; with the article, na sineacha means “the mammals”. The genitive plural is sineach, as in aicme na sineach (the class of the mammals).

Why does sineach change to shineach?

After words like mo (my) and do (your) the first letter is lenited: mo shineach. After ár (our) it stays ár sineach, because s does not take eclipsis.

How is 'sineach' related to 'sine'?

'Sineach' comes from 'sine', a teat, so a mammal is literally an animal with teats.

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