HeyRua Get the app

Certain in Irish (cinnteach): Meaning, Forms, Examples

Other uses of ‘cinnteach’: particular

The Irish for certain is cinnteach: freagra cinnteach, a certain answer.
Updated October 2026Report a mistake

How to say “certain” in Irish

Irish:
cinnteach
English:
certain, particular
Word type:
adjective
More certain:
níos cinntí
Most certain:
is cinntí
Plural:
cinnteacha
Pronunciation:
“KIN-tchukh”  /ˈcɪnʲtʲəx/

What does “cinnteach” mean?

“Cinnteach” has two alternative meanings. The most common comes first.

certain
Describes something that is sure, definite or fixed, or a person who has no doubt.Also: sure, definite, positive.
1 other meaning: particular
2particular
Refers to a specific, given thing or amount, as in a certain day or a certain number.Also: specific, given, fixed.

Other Irish adjectives for certain: áirithe (certain), cinnte (sure), deimhin (certain), dearfa (certain)

“Cinnteach” after a noun

An Irish adjective comes after its noun. Here is cinnteach after freagra (answer, masculine), after aimsir (weather, feminine) and after a plural.

after a masculine nounfreagra cinnteacha certain answer
after a feminine nounaimsir chinnteachcertain weather
after a plural nounfreagraí cinnteachacertain answers

séimhiú (the h) the ending

feminine
aimsirweather
+
cinnteachcertain
=
aimsir chinnteachcertain weather

After a feminine noun the adjective gets a séimhiú, an h after its first letter: aimsir chinnteach. After a masculine noun it stays as it is: freagra cinnteach.

plural
freagraíanswers
+
cinnteachacertain, plural
=
freagraí cinnteachacertain answers

With a plural noun the adjective takes its plural form, cinnteacha. It also gets an h after a plural that ends in a slender consonant; after other plurals it does not: aimsirí cinnteacha.

More certain, most certain, very certain

níosmore
+
cinntícertain
=
níos cinntímore certain
ismost
+
cinntícertain
=
is cinntímost certain

Táim níos cinntí anois ná mar a bhí mé inné. I am more certain now than I was yesterday.

more certainníos cinntíin the past tense: ní ba chinntí
most certainis cinntíin the past tense: ba chinntí
as certain aschomh cinnteach leno change after chomh
very certainan-chinnteachan- lenites, except d, t and s
too certainróchinnteachró- lenites

“Cinnteach” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Níl freagra cinnteach agam duit fós.
I don't have a definite answer for you yet.
Tagann sé ar uair chinnteach gach lá.
He comes at a set time every day.
Tá rialacha cinnteacha ag an gclub.
The club has definite rules.
Táim níos cinntí anois ná mar a bhí mé inné.
I am more certain now than I was yesterday.
Tá mé cinnteach go mbeidh sí anseo.
I am sure that she will be here.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Certain in Irish: frequently asked questions

What is the Irish for certain?

The Irish for certain is cinnteach (pronounced “KIN-tchukh”). It comes after the noun: freagra cinnteach, a certain answer; aimsir chinnteach, certain weather.

How do you say more certain and most certain in Irish?

níos cinntí is more certain and is cinntí is most certain. In the past tense they become ní ba chinntí and ba chinntí.

Why does cinnteach become chinnteach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So aimsir chinnteach (certain weather) but freagra cinnteach (a certain answer), because freagra is masculine.

What is the plural of cinnteach?

With a plural noun cinnteach becomes cinnteacha: freagraí cinnteacha, aimsirí cinnteacha.

How do you say very certain in Irish?

an-chinnteach. Too certain is róchinnteach, and as certain as is chomh cinnteach le.

Does cinnteach have more than one meaning?

Yes. Cinnteach can mean certain or particular, depending on context; the first is the most common.

How do I say 'definitely' using cinnteach?

Use the adverb 'go cinnteach', for example 'Beidh mé ann go cinnteach' means 'I will definitely be there'.

Which preposition goes with cinnteach when you are sure of something?

Use 'de': 'Tá mé cinnteach de sin' means 'I am sure of that'.

Learn Irish by
actually speaking it

Learn everyday Irish words like cinnteach through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen