HeyRua Get the app

Merciless in Irish (míthrócaireach): Meaning, Forms, Examples

The Irish for merciless is míthrócaireach: rí míthrócaireach, a merciless king.
Updated October 2026Report a mistake

How to say “merciless” in Irish

Irish:
míthrócaireach
English:
merciless
Word type:
adjective
More merciless:
níos míthrócairí
Most merciless:
is míthrócairí
Plural:
míthrócaireacha
Pronunciation:
“MEE-hroh-kir-ukh”  /ˈmʲiːˌhɾˠoːkəɾʲəx/

What does “míthrócaireach” mean?

merciless
Showing no mercy or pity towards others.Also: unmerciful, pitiless, ruthless, cruel.

“Míthrócaireach” after a noun

An Irish adjective comes after its noun. Here is míthrócaireach after rí (king, masculine), after aimsir (weather, feminine) and after a plural.

after a masculine nounrí míthrócaireacha merciless king
after a feminine nounaimsir mhíthrócaireachmerciless weather
after a plural nounríthe míthrócaireachamerciless kings

séimhiú (the h) the ending

feminine
aimsirweather
+
míthrócaireachmerciless
=
aimsir mhíthrócaireachmerciless weather

After a feminine noun the adjective gets a séimhiú, an h after its first letter: aimsir mhíthrócaireach. After a masculine noun it stays as it is: rí míthrócaireach.

plural
ríthekings
+
míthrócaireachamerciless, plural
=
ríthe míthrócaireachamerciless kings

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

More merciless, most merciless, very merciless

níosmore
+
míthrócairímerciless
=
níos míthrócairímore merciless
ismost
+
míthrócairímerciless
=
is míthrócairímost merciless

Bhí an dara máistir níos míthrócairí ná an chéad duine. The second master was more merciless than the first.

more mercilessníos míthrócairíin the past tense: ní ba mhíthrócairí
most mercilessis míthrócairíin the past tense: ba mhíthrócairí
as merciless aschomh míthrócaireach leno change after chomh
very mercilessan-mhíthrócaireachan- lenites, except d, t and s
too mercilessrómhíthrócaireachró- lenites

“Míthrócaireach” in a sentence: Irish examples

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

Ba rí míthrócaireach é a chuir eagla ar an tír.
He was a merciless king who frightened the country.
Bhí aimsir mhíthrócaireach ann an geimhreadh sin.
There was merciless weather that winter.
Ní raibh trua ag na saighdiúirí míthrócaireacha.
The merciless soldiers had no pity.
Bhí an dara máistir níos míthrócairí ná an chéad duine.
The second master was more merciless than the first.
Tá an namhaid míthrócaireach.
The enemy is merciless.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Merciless in Irish: frequently asked questions

What is the Irish for merciless?

The Irish for merciless is míthrócaireach (pronounced “MEE-hroh-kir-ukh”). It comes after the noun: rí míthrócaireach, a merciless king; aimsir mhíthrócaireach, merciless weather.

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

níos míthrócairí is more merciless and is míthrócairí is most merciless. In the past tense they become ní ba mhíthrócairí and ba mhíthrócairí.

Why does míthrócaireach become mhíthrócaireach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So aimsir mhíthrócaireach (merciless weather) but rí míthrócaireach (a merciless king), because rí is masculine.

What is the plural of míthrócaireach?

With a plural noun míthrócaireach becomes míthrócaireacha: ríthe míthrócaireacha, aimsirí míthrócaireacha.

How do you say very merciless in Irish?

an-mhíthrócaireach. Too merciless is rómhíthrócaireach, and as merciless as is chomh míthrócaireach le.

What is the opposite of míthrócaireach?

The opposite is trócaireach, meaning merciful, from trócaire 'mercy'; the prefix mí- makes it negative.

How do I say 'mercilessly'?

Use go before it: go míthrócaireach, as in 'Músclaíodh go míthrócaireach mé', I was woken up mercilessly.

Learn Irish by
actually speaking it

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

7-day free trial. Cancel anytime.

The HeyRua app home screen