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Cancerous in Irish (ailseach): Meaning, Forms, Examples

The Irish for cancerous is ailseach: siad ailseach, a cancerous tumour.
Updated October 2026Report a mistake

How to say “cancerous” in Irish

Irish:
ailseach
English:
cancerous
Word type:
adjective
More cancerous:
níos ailsí
Most cancerous:
is ailsí
Plural:
ailseacha
Pronunciation:
“AL-shuhkh”  /ˈalʲʃəx/

What does “ailseach” mean?

cancerous
Affected by cancer or of the nature of cancer.Also: malignant, carcinomatous, cancer.

“Ailseach” after a noun

An Irish adjective comes after its noun. Here is ailseach after siad (tumour, masculine), after bean (woman, feminine) and after a plural.

after a masculine nounsiad ailseacha cancerous tumour
after a feminine nounbean ailseacha cancerous woman
after a plural nounsiadaí ailseachacancerous tumours

séimhiú (the h) the ending

plural
siadaítumours
+
ailseachacancerous, plural
=
siadaí ailseachacancerous tumours

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

More cancerous, most cancerous, very cancerous

níosmore
+
ailsícancerous
=
níos ailsímore cancerous
ismost
+
ailsícancerous
=
is ailsímost cancerous

Bhí an dara meall níos ailsí ná an chéad cheann. The second tumour was more cancerous than the first.

more cancerousníos ailsíin the past tense: ní b'ailsí
most cancerousis ailsíin the past tense: ab ailsí
as cancerous aschomh hailseach lechomh puts an h before a vowel
very cancerousan-ailseachan- lenites, except d, t and s
too cancerousró-ailseachró- lenites

“Ailseach” in a sentence: Irish examples

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

Fuarthas meall ailseach ina scamhóg.
A cancerous tumour was found in his lung.
Baineadh an fhaithne ailseach den chraiceann.
The cancerous wart was removed from the skin.
Scrios an cógas na cealla ailseacha.
The drug destroyed the cancerous cells.
Bhí an dara meall níos ailsí ná an chéad cheann.
The second tumour was more cancerous than the first.
Dúirt an dochtúir go raibh an cnap ailseach.
The doctor said the lump was cancerous.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Cancerous in Irish: frequently asked questions

What is the Irish for cancerous?

The Irish for cancerous is ailseach (pronounced “AL-shuhkh”). It comes after the noun: siad ailseach, a cancerous tumour; bean ailseach, a cancerous woman.

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

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

What is the plural of ailseach?

With a plural noun ailseach becomes ailseacha: siadaí ailseacha, mná ailseacha.

How do you say very cancerous in Irish?

an-ailseach. Too cancerous is ró-ailseach, and as cancerous as is chomh hailseach le.

What is the difference between 'ailseach' and 'urchóideach'?

'Ailseach' means cancerous, from 'ailse' (cancer), while 'urchóideach' means malignant or harmful, as in 'siad urchóideach' (a malignant tumour).

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