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Resistant in Irish (frithsheasmhach): Meaning, Forms, Examples

Other uses of ‘frithsheasmhach’: opposing

The Irish for resistant is frithsheasmhach: ábhar frithsheasmhach, a resistant material.
Updated October 2026Report a mistake

How to say “resistant” in Irish

Irish:
frithsheasmhach
English:
resistant, opposing
Word type:
adjective
More resistant:
níos frithsheasmhaí
Most resistant:
is frithsheasmhaí
Plural:
frithsheasmhacha
Pronunciation:
“FRIH-hass-wakh”  /ˈfʲɾʲɪhasˠwəx/

What does “frithsheasmhach” mean?

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

resistant
Able to resist or withstand something, such as heat, disease or force.Also: resisting, withstanding, proof against.
1 other meaning: opposing
2opposing
Standing against or opposing something.Also: resisting, counteracting.

“Frithsheasmhach” after a noun

An Irish adjective comes after its noun. Here is frithsheasmhach after ábhar (material, masculine), after bean (woman, feminine) and after a plural.

after a masculine nounábhar frithsheasmhacha resistant material
after a feminine nounbean fhrithsheasmhacha resistant woman
after a plural nounábhair fhrithsheasmhacharesistant materials

séimhiú (the h) the ending

feminine
beanwoman
+
frithsheasmhachresistant
=
bean fhrithsheasmhacha resistant woman

After a feminine noun the adjective gets a séimhiú, an h after its first letter: bean fhrithsheasmhach. After a masculine noun it stays as it is: ábhar frithsheasmhach.

plural
ábhairmaterials
+
frithsheasmhacharesistant, plural
=
ábhair fhrithsheasmhacharesistant materials

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

More resistant, most resistant, very resistant

níosmore
+
frithsheasmhaíresistant
=
níos frithsheasmhaímore resistant
ismost
+
frithsheasmhaíresistant
=
is frithsheasmhaímost resistant

Tá baictéir fhrithsheasmhacha ag éirí níos coitianta. Resistant bacteria are becoming more common.

more resistantníos frithsheasmhaíin the past tense: ní ba fhrithsheasmhaí
most resistantis frithsheasmhaíin the past tense: ba fhrithsheasmhaí
as resistant aschomh frithsheasmhach leno change after chomh
very resistantan-fhrithsheasmhachan- lenites, except d, t and s
too resistantrófhrithsheasmhachró- lenites

“Frithsheasmhach” in a sentence: Irish examples

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

Is ábhar frithsheasmhach é seo.
This is a resistant material.
Cheannaigh sé cóta frithsheasmhach in aghaidh na báistí.
He bought a rain-resistant coat.
Tá baictéir fhrithsheasmhacha ag éirí níos coitianta.
Resistant bacteria are becoming more common.
Tá an miotal seo níos frithsheasmhaí ná cruach.
This metal is more resistant than steel.
Tá an t-ábhar frithsheasmhach in aghaidh teasa.
The material is resistant to heat.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Resistant in Irish: frequently asked questions

What is the Irish for resistant?

The Irish for resistant is frithsheasmhach (pronounced “FRIH-hass-wakh”). It comes after the noun: ábhar frithsheasmhach, a resistant material; bean fhrithsheasmhach, a resistant woman.

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

níos frithsheasmhaí is more resistant and is frithsheasmhaí is most resistant. In the past tense they become ní ba fhrithsheasmhaí and ba fhrithsheasmhaí.

Why does frithsheasmhach become fhrithsheasmhach?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So bean fhrithsheasmhach (a resistant woman) but ábhar frithsheasmhach (a resistant material), because ábhar is masculine.

What is the plural of frithsheasmhach?

With a plural noun frithsheasmhach becomes frithsheasmhacha: ábhair fhrithsheasmhacha, mná frithsheasmhacha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very resistant in Irish?

an-fhrithsheasmhach. Too resistant is rófhrithsheasmhach, and as resistant as is chomh frithsheasmhach le.

Does frithsheasmhach have more than one meaning?

Yes. Frithsheasmhach can mean resistant or opposing, depending on context; the first is the most common.

Which preposition goes with frithsheasmhach?

Use 'in aghaidh' or 'do': 'frithsheasmhach in aghaidh teasa' means resistant to heat.

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