HeyRua Get the app

Effective in Irish (éifeachtach): Meaning, Forms, Examples

Other uses of ‘éifeachtach’: forceful

The Irish for effective is éifeachtach: leigheas éifeachtach, an effective cure.
Updated October 2026Report a mistake

How to say “effective” in Irish

Irish:
éifeachtach
English:
effective, forceful
Word type:
adjective
More effective:
níos éifeachtaí
Most effective:
is éifeachtaí
Plural:
éifeachtacha
Pronunciation:
“AY-fakh-takh”  /ˈeːfʲəxtəx/

What does “éifeachtach” mean?

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

effective
Producing the result that is wanted.Also: efficacious, efficient, successful.
1 other meaning: forceful
2forceful
Having strength and influence, powerful in effect.Also: powerful, telling, significant.

Other Irish adjectives for effective: éifeachtúil (efficient)

“Éifeachtach” after a noun

An Irish adjective comes after its noun. Here is éifeachtach after leigheas (cure, masculine), after bean (woman, feminine) and after a plural.

after a masculine nounleigheas éifeachtachan effective cure
after a feminine nounbean éifeachtachan effective woman
after a plural nounleigheasanna éifeachtachaeffective cures

séimhiú (the h) the ending

plural
leigheasannacures
+
éifeachtachaeffective, plural
=
leigheasanna éifeachtachaeffective cures

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

More effective, most effective, very effective

níosmore
+
éifeachtaíeffective
=
níos éifeachtaímore effective
ismost
+
éifeachtaíeffective
=
is éifeachtaímost effective

Tá an cógas nua níos éifeachtaí ná an seancheann. The new medicine is more effective than the old one.

more effectiveníos éifeachtaíin the past tense: ní b'éifeachtaí
most effectiveis éifeachtaíin the past tense: ab éifeachtaí
as effective aschomh héifeachtach lechomh puts an h before a vowel
very effectivean-éifeachtachan- lenites, except d, t and s
too effectiveró-éifeachtachró- lenites

“Éifeachtach” in a sentence: Irish examples

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

Is leigheas éifeachtach é sin don slaghdán.
That is an effective cure for a cold.
Fuair siad modh éifeachtach chun an obair a dhéanamh.
They found an effective method to do the work.
Tá bearta éifeachtacha ag teastáil anois.
Effective measures are needed now.
Tá an cógas nua níos éifeachtaí ná an seancheann.
The new medicine is more effective than the old one.
Tá an plean seo an-éifeachtach.
This plan is very effective.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Effective in Irish: frequently asked questions

What is the Irish for effective?

The Irish for effective is éifeachtach (pronounced “AY-fakh-takh”). It comes after the noun: leigheas éifeachtach, an effective cure; bean éifeachtach, an effective woman.

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

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

What is the plural of éifeachtach?

With a plural noun éifeachtach becomes éifeachtacha: leigheasanna éifeachtacha, mná éifeachtacha.

How do you say very effective in Irish?

an-éifeachtach. Too effective is ró-éifeachtach, and as effective as is chomh héifeachtach le.

Does éifeachtach have more than one meaning?

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

What is the difference between 'éifeachtach' and 'éifeachtúil'?

'Éifeachtach' usually means effective, getting the desired result, while 'éifeachtúil' is often used for efficient, working without waste. In practice the two overlap a good deal.

How do I say 'effectively' in Irish?

Use the adverb 'go héifeachtach', for example 'D'oibrigh sé go héifeachtach' (He worked effectively).

Learn Irish by
actually speaking it

Learn everyday Irish words like éifeachtach through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen