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Mysterious in Irish (mistéireach): Meaning, Forms, Examples

The Irish for mysterious is mistéireach: fear mistéireach, a mysterious man.
Updated October 2026Report a mistake

How to say “mysterious” in Irish

Irish:
mistéireach
English:
mysterious
Word type:
adjective
More mysterious:
níos mistéirí
Most mysterious:
is mistéirí
Plural:
mistéireacha
Pronunciation:
“mish-TAY-rach”  /mʲɪʃˈtʲeːɾʲəx/

What does “mistéireach” mean?

mysterious
Strange and hard to understand or explain, full of mystery.Also: mystical, enigmatic, mystic.

“Mistéireach” after a noun

An Irish adjective comes after its noun. Here is mistéireach after fear (man, masculine), after áit (place, feminine) and after a plural.

after a masculine nounfear mistéireacha mysterious man
after a feminine nounáit mhistéireacha mysterious place
after a plural nounfir mhistéireachamysterious men

séimhiú (the h) the ending

feminine
áitplace
+
mistéireachmysterious
=
áit mhistéireacha mysterious place

After a feminine noun the adjective gets a séimhiú, an h after its first letter: áit mhistéireach. After a masculine noun it stays as it is: fear mistéireach.

plural
firmen
+
mistéireachamysterious, plural
=
fir mhistéireachamysterious men

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

More mysterious, most mysterious, very mysterious

níosmore
+
mistéirímysterious
=
níos mistéirímore mysterious
ismost
+
mistéirímysterious
=
is mistéirímost mysterious

Bhí an dara scéal níos mistéirí ná an chéad cheann. The second story was more mysterious than the first one.

more mysteriousníos mistéiríin the past tense: ní ba mhistéirí
most mysteriousis mistéiríin the past tense: ba mhistéirí
as mysterious aschomh mistéireach leno change after chomh
very mysteriousan-mhistéireachan- lenites, except d, t and s
too mysteriousrómhistéireachró- lenites

“Mistéireach” in a sentence: Irish examples

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

Tháinig fear mistéireach isteach sa siopa.
A mysterious man came into the shop.
Chonaiceamar solas i dteach mistéireach ar an gcnoc.
We saw a light in a mysterious house on the hill.
Chuala sé fuaimeanna mistéireacha san oíche.
He heard mysterious sounds in the night.
Bhí an dara scéal níos mistéirí ná an chéad cheann.
The second story was more mysterious than the first one.
Tá an scéal sin an-mhistéireach.
That story is very mysterious.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Mysterious in Irish: frequently asked questions

What is the Irish for mysterious?

The Irish for mysterious is mistéireach (pronounced “mish-TAY-rach”). It comes after the noun: fear mistéireach, a mysterious man; áit mhistéireach, a mysterious place.

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

níos mistéirí is more mysterious and is mistéirí is most mysterious. In the past tense they become ní ba mhistéirí and ba mhistéirí.

Why does mistéireach become mhistéireach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So áit mhistéireach (a mysterious place) but fear mistéireach (a mysterious man), because fear is masculine.

What is the plural of mistéireach?

With a plural noun mistéireach becomes mistéireacha: fir mhistéireacha, áiteanna mistéireacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very mysterious in Irish?

an-mhistéireach. Too mysterious is rómhistéireach, and as mysterious as is chomh mistéireach le.

What is the difference between 'mistéireach' and 'rúndiamhair'?

'Mistéireach' is a common everyday word for mysterious, while 'rúndiamhair' is more literary and often used for religious mystery, as in 'rúndiamhair an chreidimh'.

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