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Efficient in Irish (éifeachtúil): Meaning, Forms, Examples

Other uses of ‘éifeachtúil’: effective

The Irish for efficient is éifeachtúil: córas éifeachtúil, an efficient system.
Updated October 2026Report a mistake

How to say “efficient” in Irish

Irish:
éifeachtúil
English:
efficient, effective
Word type:
adjective
More efficient:
níos éifeachtúla
Most efficient:
is éifeachtúla
Plural:
éifeachtúla
Pronunciation:
“AY-fokh-tool”  /eːfʲəxtuːlʲ/

What does “éifeachtúil” mean?

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

efficient
Working well and getting results without wasting time or effort.Also: effective, productive, competent.
1 other meaning: effective
2effective
Producing the intended result or having a real effect.Also: effectual, efficacious, successful.

“Éifeachtúil” after a noun

An Irish adjective comes after its noun. Here is éifeachtúil after córas (system, masculine), after bean (woman, feminine) and after a plural.

after a masculine nouncóras éifeachtúilan efficient system
after a feminine nounbean éifeachtúilan efficient woman
after a plural nouncórais éifeachtúlaefficient systems

séimhiú (the h) the ending

plural
córaissystems
+
éifeachtúlaefficient, plural
=
córais éifeachtúlaefficient systems

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

More efficient, most efficient, very efficient

níosmore
+
éifeachtúlaefficient
=
níos éifeachtúlamore efficient
ismost
+
éifeachtúlaefficient
=
is éifeachtúlamost efficient

Tá an t-inneall nua níos éifeachtúla ná an seancheann. The new engine is more efficient than the old one.

more efficientníos éifeachtúlain the past tense: ní b'éifeachtúla
most efficientis éifeachtúlain the past tense: ab éifeachtúla
as efficient aschomh héifeachtúil lechomh puts an h before a vowel
very efficientan-éifeachtúilan- lenites, except d, t and s
too efficientró-éifeachtúilró- lenites

“Éifeachtúil” in a sentence: Irish examples

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

Tá córas éifeachtúil acu anois.
They have an efficient system now.
Is oibrí éifeachtúil í Máire.
Máire is an efficient worker.
Teastaíonn modhanna oibre éifeachtúla uainn.
We need efficient working methods.
Tá an t-inneall nua níos éifeachtúla ná an seancheann.
The new engine is more efficient than the old one.
Tá an leigheas sin an-éifeachtúil.
That cure is very effective.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Efficient in Irish: frequently asked questions

What is the Irish for efficient?

The Irish for efficient is éifeachtúil (pronounced “AY-fokh-tool”). It comes after the noun: córas éifeachtúil, an efficient system; bean éifeachtúil, an efficient woman.

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

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

What is the plural of éifeachtúil?

With a plural noun éifeachtúil becomes éifeachtúla: córais éifeachtúla, mná éifeachtúla.

How do you say very efficient in Irish?

an-éifeachtúil. Too efficient is ró-éifeachtúil, and as efficient as is chomh héifeachtúil le.

Does éifeachtúil have more than one meaning?

Yes. Éifeachtúil can mean efficient or effective, depending on context; the first is the most common.

What is the difference between éifeachtúil and éifeachtach?

Both mean effective or efficient and often overlap; éifeachtach is more commonly used for effective, while éifeachtúil is often preferred for efficient, as in córas éifeachtúil.

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