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Terrible in Irish (millteanach): Meaning, Forms, Examples

Other uses of ‘millteanach’: destructive · tremendous

The Irish for terrible is millteanach: ionsaí millteanach, a terrible attack.
Updated October 2026Report a mistake

How to say “terrible” in Irish

Irish:
millteanach
English:
terrible, destructive, tremendous
Word type:
adjective
More terrible:
níos millteanaí
Most terrible:
is millteanaí
Plural:
millteanacha
Pronunciation:
“MIL-tchan-ukh”  /mʲɪl̠ʲtʲənˠəx/

What does “millteanach” mean?

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

terrible
Very bad, awful or dreadful.Also: awful, dreadful, horrible.
2 other meanings: destructive or tremendous
2destructive
Causing damage, ruin or destruction.Also: ruinous, damaging, harmful.
3tremendous
Very great in amount or degree, often used as an intensifier.Also: enormous, huge, extreme.

Other Irish adjectives for terrible: uafásach (terrible)

“Millteanach” after a noun

An Irish adjective comes after its noun. Here is millteanach after ionsaí (attack, masculine), after stoirm (storm, feminine) and after a plural.

after a masculine nounionsaí millteanacha terrible attack
after a feminine nounstoirm mhillteanacha terrible storm
after a plural nounionsaithe millteanachaterrible attacks

séimhiú (the h) the ending

feminine
stoirmstorm
+
millteanachterrible
=
stoirm mhillteanacha terrible storm

After a feminine noun the adjective gets a séimhiú, an h after its first letter: stoirm mhillteanach. After a masculine noun it stays as it is: ionsaí millteanach.

plural
ionsaitheattacks
+
millteanachaterrible, plural
=
ionsaithe millteanachaterrible attacks

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

More terrible, most terrible, very terrible

níosmore
+
millteanaíterrible
=
níos millteanaímore terrible
ismost
+
millteanaíterrible
=
is millteanaímost terrible

Bhí an aimsir níos millteanaí inniu ná inné. The weather was worse today than yesterday.

more terribleníos millteanaíin the past tense: ní ba mhillteanaí
most terribleis millteanaíin the past tense: ba mhillteanaí
as terrible aschomh millteanach leno change after chomh
very terriblean-mhillteanachan- lenites, except d, t and s
too terriblerómhillteanachró- lenites

“Millteanach” in a sentence: Irish examples

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

Bhí lá millteanach againn inné.
We had a terrible day yesterday.
Rinne an stoirm mhillteanach damáiste mór.
The terrible storm did great damage.
Bhí tuilte millteanacha ann sa gheimhreadh.
There were terrible floods in the winter.
Bhí an aimsir níos millteanaí inniu ná inné.
The weather was worse today than yesterday.
Tá an trácht millteanach ar maidin.
The traffic is terrible in the morning.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Terrible in Irish: frequently asked questions

What is the Irish for terrible?

The Irish for terrible is millteanach (pronounced “MIL-tchan-ukh”). It comes after the noun: ionsaí millteanach, a terrible attack; stoirm mhillteanach, a terrible storm.

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

níos millteanaí is more terrible and is millteanaí is most terrible. In the past tense they become ní ba mhillteanaí and ba mhillteanaí.

Why does millteanach become mhillteanach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So stoirm mhillteanach (a terrible storm) but ionsaí millteanach (a terrible attack), because ionsaí is masculine.

What is the plural of millteanach?

With a plural noun millteanach becomes millteanacha: ionsaithe millteanacha, stoirmeacha millteanacha.

How do you say very terrible in Irish?

an-mhillteanach. Too terrible is rómhillteanach, and as terrible as is chomh millteanach le.

Does millteanach have more than one meaning?

Yes. Millteanach can mean terrible, destructive or tremendous, depending on context; the first is the most common.

What is the difference between 'millteanach' and 'uafásach'?

Both mean terrible, but 'millteanach' comes from 'mill' (destroy) and can also mean destructive, while 'uafásach' is the more general everyday word for awful.

Can 'millteanach' be used as an intensifier?

Yes, as in 'millteanach mór' meaning tremendously big, much like 'uafásach' in 'uafásach deas'.

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