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Knowledgeable in Irish (eolach): Meaning, Forms, Examples

Other uses of ‘eolach’: familiar · guiding

The Irish for knowledgeable is eolach: duine eolach, a knowledgeable person.
Updated October 2026Report a mistake

How to say “knowledgeable” in Irish

Irish:
eolach
English:
knowledgeable, familiar, guiding
Word type:
adjective
More knowledgeable:
níos eolaí
Most knowledgeable:
is eolaí
Plural:
eolacha
Pronunciation:
“OH-lukh”  /oːl̪ˠəx/

What does “eolach” mean?

“Eolach” has three alternative meanings. The most common comes first.

knowledgeable
Having a lot of knowledge or information about something.Also: well-informed, learned, expert.
2 other meanings: familiar or guiding
2familiar
Knowing a person, place or thing well, used with "ar".Also: acquainted, conversant, well up on.
3guiding
Showing or knowing the way, as of a guide.Also: knowing the way, instructive.

Other Irish adjectives for knowledgeable: saineolach (expert)

“Eolach” after a noun

An Irish adjective comes after its noun. Here is eolach after duine (person, masculine), after bean (woman, feminine) and after a plural.

after a masculine nounduine eolacha knowledgeable person
after a feminine nounbean eolacha knowledgeable woman
after a plural noundaoine eolachaknowledgeable people

séimhiú (the h) the ending

plural
daoinepeople
+
eolachaknowledgeable, plural
=
daoine eolachaknowledgeable people

With a plural noun the adjective takes its plural form, eolacha.

More knowledgeable, most knowledgeable, very knowledgeable

níosmore
+
eolaíknowledgeable
=
níos eolaímore knowledgeable
ismost
+
eolaíknowledgeable
=
is eolaímost knowledgeable

Tá Síle níos eolaí ná a deartháir. Síle is more knowledgeable than her brother.

more knowledgeableníos eolaíin the past tense: ní b'eolaí
most knowledgeableis eolaíin the past tense: ab eolaí
as knowledgeable aschomh heolach lechomh puts an h before a vowel
very knowledgeablean-eolachan- lenites, except d, t and s
too knowledgeableró-eolachró- lenites

“Eolach” in a sentence: Irish examples

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

Is duine eolach é an múinteoir sin.
That teacher is a knowledgeable person.
Bean eolach is ea mo sheanmháthair.
My grandmother is a knowledgeable woman.
Labhair na daoine eolacha ag an gcruinniú.
The knowledgeable people spoke at the meeting.
Tá Síle níos eolaí ná a deartháir.
Síle is more knowledgeable than her brother.
Tá sé an-eolach ar stair na hÉireann.
He is very knowledgeable about Irish history.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Knowledgeable in Irish: frequently asked questions

What is the Irish for knowledgeable?

The Irish for knowledgeable is eolach (pronounced “OH-lukh”). It comes after the noun: duine eolach, a knowledgeable person; bean eolach, a knowledgeable woman.

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

níos eolaí is more knowledgeable and is eolaí is most knowledgeable. In the past tense they become ní b'eolaí and ab eolaí.

What is the plural of eolach?

With a plural noun eolach becomes eolacha: daoine eolacha, mná eolacha.

How do you say very knowledgeable in Irish?

an-eolach. Too knowledgeable is ró-eolach, and as knowledgeable as is chomh heolach le.

Does eolach have more than one meaning?

Yes. Eolach can mean knowledgeable, familiar or guiding, depending on context; the first is the most common.

Which preposition goes with eolach?

Use "ar": "Tá sí eolach ar an gceantar" means she knows the area well.

What is the opposite of eolach?

The opposite is "aineolach", ignorant or uninformed, as in "Tá mé aineolach ar an ábhar".

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