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Sinful in Irish (peacach): Meaning, Forms, Examples

Other uses of ‘peacach’: sinner (noun, masculine)

The Irish for sinful is peacach: duine peacach, a sinful person.
Updated October 2026Report a mistake

How to say “sinful” in Irish

Irish:
peacach
English:
sinful
Word type:
adjective
More sinful:
níos peacaí
Most sinful:
is peacaí
Plural:
peacacha
Pronunciation:
“PAK-ukh”  /ˈpʲakəx/

What does “peacach” mean?

sinful
Wrong in a religious or moral sense, or given to committing sin.Also: wicked, immoral, unholy.
Other entries for “peacach”

The same spelling has its own page as:

“Peacach” after a noun

An Irish adjective comes after its noun. Here is peacach after duine (person, masculine), after beatha (life, feminine) and after a plural.

after a masculine nounduine peacacha sinful person
after a feminine nounbeatha pheacacha sinful life
after a plural noundaoine peacachasinful people

séimhiú (the h) the ending

feminine
beathalife
+
peacachsinful
=
beatha pheacacha sinful life

After a feminine noun the adjective gets a séimhiú, an h after its first letter: beatha pheacach. After a masculine noun it stays as it is: duine peacach.

plural
daoinepeople
+
peacachasinful, plural
=
daoine peacachasinful people

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

More sinful, most sinful, very sinful

níosmore
+
peacaísinful
=
níos peacaímore sinful
ismost
+
peacaísinful
=
is peacaímost sinful

Níl aon duine níos peacaí ná duine eile. No one is more sinful than anyone else.

more sinfulníos peacaíin the past tense: ní ba pheacaí
most sinfulis peacaíin the past tense: ba pheacaí
as sinful aschomh peacach leno change after chomh
very sinfulan-pheacachan- lenites, except d, t and s
too sinfulrópheacachró- lenites

“Peacach” in a sentence: Irish examples

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

Ba dhuine peacach é, dar leis an sagart.
He was a sinful person, according to the priest.
Chaith sé beatha pheacach ina óige.
He lived a sinful life in his youth.
Bhí smaointe peacacha ina cheann.
He had sinful thoughts in his head.
Níl aon duine níos peacaí ná duine eile.
No one is more sinful than anyone else.
Tá an cine daonna peacach, a deir siad.
The human race is sinful, they say.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Sinful in Irish: frequently asked questions

What is the Irish for sinful?

The Irish for sinful is peacach (pronounced “PAK-ukh”). It comes after the noun: duine peacach, a sinful person; beatha pheacach, a sinful life.

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

níos peacaí is more sinful and is peacaí is most sinful. In the past tense they become ní ba pheacaí and ba pheacaí.

Why does peacach become pheacach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So beatha pheacach (a sinful life) but duine peacach (a sinful person), because duine is masculine.

What is the plural of peacach?

With a plural noun peacach becomes peacacha: daoine peacacha, beathaí peacacha.

How do you say very sinful in Irish?

an-pheacach. Too sinful is rópheacach, and as sinful as is chomh peacach le.

Is 'peacach' also a noun?

Yes, 'peacach' as a noun means 'a sinner', as in 'Is peacach mé', 'I am a sinner'. As an adjective it means 'sinful'.

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