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Insecticide in Irish (Feithidicíd): Meaning, Pronunciation, Usage

The Irish for insecticide is feithidicíd, a feminine noun (plural feithidicídí).
Updated October 2026Report a mistake

How to say “insecticide” in Irish

Irish:
feithidicíd
English:
insecticide
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“FEH-hid-ih-keej”  /ˈfʲɛhədʲəkʲiːdʲ/
Various forms
Plural:
feithidicídí (insecticides)
Genitive singular:
feithidicíde, na feithidicíde (e.g. buidéal feithidicíde, a bottle of insecticide)
Genitive plural:
feithidicídí, na bhfeithidicídí (e.g. úsáid na bhfeithidicídí, the use of the insecticides)

What does “feithidicíd” mean?

insecticide
A chemical substance used to kill insects.Also: insect killer, pesticide, bug spray.

“Feithidicíd” with the article

The plural of insecticide in Irish is feithidicídí. Here is feithidicíd after the article (an t-alt), in the singular and the plural.

an fheithidicíd
the insecticide
Lenition: f becomes fh after an (feminine noun)
na feithidicídí
the insecticides
Plural: no change after na

“Feithidicíd” in a sentence: Irish examples

Common Irish sentences using feithidicíd, the Irish word for insecticide.

Chuir an feirmeoir feithidicíd ar na barra.
The farmer put insecticide on the crops.
Tá an fheithidicíd seo an-láidir.
This insecticide is very strong.
Ná lig do na páistí teagmháil leis an bhfeithidicíd.
Don't let the children touch the insecticide.
Bhí boladh láidir feithidicíde sa ghairdín.
There was a strong smell of insecticide in the garden.
Déanann feithidicídí dochar do na beacha.
Insecticides harm the bees.
Cheannaigh mé feithidicíd nua sa siopa.
I bought a new insecticide in the shop.
Tá cosc ar roinnt feithidicídí san Eoraip.
Some insecticides are banned in Europe.

Other nouns in Irish

More everyday Irish nouns to learn next.

Insecticide in Irish: frequently asked questions

What is the Irish for insecticide?

The Irish for insecticide is feithidicíd (pronounced “FEH-hid-ih-keej”). It’s a feminine noun and the plural is feithidicídí.

How do you pronounce feithidicíd in Irish?

Feithidicíd is said like “FEH-hid-ih-keej” (IPA /ˈfʲɛhədʲəkʲiːdʲ/).

What is the plural of insecticide in Irish?

The plural of feithidicíd is feithidicídí; with the article, na feithidicídí means “the insecticides”. The genitive plural is feithidicídí, as in úsáid na bhfeithidicídí (the use of the insecticides).

Why does feithidicíd change to fheithidicíd or bhfeithidicíd?

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

How is 'feithidicíd' different from 'lotnaidicíd'?

'Feithidicíd' kills insects (from 'feithid', insect), while 'lotnaidicíd' is the broader word for pesticide.

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