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Weedkiller in Irish (Fiailnimh): Meaning, Pronunciation, Usage

The Irish for weedkiller is fiailnimh, a feminine noun (plural fiailnimheanna).
Updated October 2026Report a mistake

How to say “weedkiller” in Irish

Irish:
fiailnimh
English:
weedkiller
Word type:
noun
Gender:
feminine
Pronunciation:
“FEE-ul-niv”  /ˈfʲiəlʲnʲɪvʲ/
Various forms
Plural:
fiailnimheanna (weedkillers)
Genitive singular:
fiailnimhe, na fiailnimhe (e.g. buidéal fiailnimhe, a bottle of weedkiller)
Genitive plural:
fiailnimheanna, na bhfiailnimheanna (e.g. úsáid na bhfiailnimheanna, the use of the herbicides)

What does “fiailnimh” mean?

weedkiller
A chemical substance used to kill weeds and unwanted plants.Also: herbicide, weed killer.

“Fiailnimh” with the article

The plural of weedkiller in Irish is fiailnimheanna. Here is fiailnimh after the article (an t-alt), in the singular and the plural.

an fhiailnimh
the weedkiller
Lenition: f becomes fh after an (feminine noun)
na fiailnimheanna
the weedkillers
Plural: no change after na

“Fiailnimh” in a sentence: Irish examples

Common Irish sentences using fiailnimh, the Irish word for weedkiller.

Chuir sé fiailnimh ar an gcosán.
He put weedkiller on the path.
Tá an fhiailnimh sa tseid.
The weedkiller is in the shed.
Ná lig do na páistí an fhiailnimh a bhaint amach.
Don't let the children get at the weedkiller.
Cheannaigh mé buidéal fiailnimhe inné.
I bought a bottle of weedkiller yesterday.
Is baolach do na beacha cuid de na fiailnimheanna.
Some of the herbicides are dangerous to bees.
Ní úsáideann m'athair fiailnimh sa ghairdín.
My father doesn't use weedkiller in the garden.
Tá cosc ar an bhfiailnimh sin anois.
That herbicide is banned now.

Other nouns in Irish

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Weedkiller in Irish: frequently asked questions

What is the Irish for weedkiller?

The Irish for weedkiller is fiailnimh (pronounced “FEE-ul-niv”). It’s a feminine noun and the plural is fiailnimheanna.

How do you pronounce fiailnimh in Irish?

Fiailnimh is said like “FEE-ul-niv” (IPA /ˈfʲiəlʲnʲɪvʲ/).

What is the plural of weedkiller in Irish?

The plural of fiailnimh is fiailnimheanna; with the article, na fiailnimheanna means “the weedkillers”. The genitive plural is fiailnimheanna, as in úsáid na bhfiailnimheanna (the use of the herbicides).

Why does fiailnimh change to fhiailnimh or bhfiailnimh?

Irish changes the start of some words after certain words. After mo (my) fiailnimh becomes m'fhiailnimh (lenition), and after ár (our) or i (in) it becomes ár bhfiailnimh (eclipsis).

How is 'fiailnimh' formed?

It combines 'fiaile' (weed) with 'nimh' (poison), so it literally means 'weed poison'.

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