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Knowledge in Irish (Eol): Meaning, Pronunciation, Usage

‘eol’ also means: guide

The Irish for knowledge is eol, a masculine noun.
Updated October 2026Report a mistake

How to say “knowledge” in Irish

Irish:
eol
English:
knowledge, guide
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“ohl”  /oːlˠ/
Various forms
Genitive singular:
eoil, an eoil (e.g. fear eoil, a guide (man who knows the way))

What does “eol” mean?

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

knowledge
Knowledge or awareness of something, used mostly in the phrase 'is eol do' meaning 'knows'.Also: awareness, acquaintance, know.
1 other meaning: guide
2guide
Knowledge of the way, guidance or direction, as in 'eolaí' or 'fear eoil' (a guide).Also: guidance, direction.

Other Irish words for knowledge: fios (knowledge), eolas (knowledge), iúl (knowledge), aithnid (acquaintance)

“Eol” with the article

Here is eol after the article (an t-alt).

an t-eol
the knowledge
Masculine nouns take t before a vowel after an

“Eol” in a sentence: Irish examples

Common Irish sentences using eol, the Irish word for knowledge.

Is eol dom go bhfuil sé tinn.
I know that he is sick.
Mar is eol duit, amárach an spriocdháta.
As you know, the deadline is tomorrow.
A fhad agus is eol dom, tá sé seo fíor.
As far as I know, this is true.
Ní heol d'aon duine cá bhfuil sí.
Nobody knows where she is.
Ar eol duit cén t-am é?
Do you know what time it is?
Bhí fear eoil linn ar an sliabh.
We had a guide with us on the mountain.
Mar is eol dúinn anois, bhí an ceart aige.
As we know now, he was right.

Other nouns in Irish

More everyday Irish nouns to learn next.

Knowledge in Irish: frequently asked questions

What is the Irish for knowledge?

The Irish for knowledge is eol (pronounced “ohl”). It’s a masculine noun. Depending on context it can also mean guide.

How do you pronounce eol in Irish?

Eol is said like “ohl” (IPA /oːlˠ/).

Does eol have a plural?

No plural form is given for eol in the standard. Many abstract and mass nouns in Irish have no plural.

Does eol have more than one meaning?

Yes. Eol can mean knowledge or guide, depending on context; the first is the most common.

Why does eol sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-eol (the knowledge), a heol (her knowledge), a n-eol (their knowledge).

What is the difference between 'is eol dom' and 'tá a fhios agam'?

Both mean 'I know'. 'Is eol dom' is a little more formal, while 'tá a fhios agam' is the everyday phrase.

How is 'eol' related to 'eolas'?

'Eolas' is the ordinary noun for knowledge or information, while 'eol' survives mainly in set phrases like 'is eol dom'.

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