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Fertilization in Irish (Toirchiú): Meaning, Pronunciation, Usage

The Irish for fertilization is toirchiú, a masculine noun. Ag toirchiú is fertilizing, from the verb toirchigh.
Updated October 2026Report a mistake

How to say “fertilization” in Irish

Irish:
toirchiú
English:
fertilization
Word type:
noun (verbal noun)
Verbal noun of:
toirchigh, to fertilize (ag toirchiú, fertilizing)
Gender:
masculine, fourth declension
Pronunciation:
“TIR-ih-khoo”  /ˈt̪ˠɛɾʲəxuː/
Various forms
Genitive singular:
toirchithe, an toirchithe (e.g. próiseas an toirchithe, the process of fertilization)

What does “toirchiú” mean?

fertilization
The act of fertilizing an egg or making a female pregnant; the verbal noun of the verb toirchigh.Also: fecundation, impregnation, conception.

“Toirchiú” as a verbal noun

After ag, toirchiú means fertilizing: it is the verbal noun of the verb toirchigh (to fertilize). A noun that follows it goes into the genitive.

agat
+
toirchiúverbal noun
=
ag toirchiúfertilizing

“Toirchiú” with the article

Here is toirchiú after the article (an t-alt).

an toirchiú
the fertilization
No change after an

“Toirchiú” in a sentence: Irish examples

Common Irish sentences using toirchiú, the Irish word for fertilization.

Tarlaíonn toirchiú nuair a bhuaileann an speirm leis an ubh.
Fertilization happens when the sperm meets the egg.
Mhínigh an múinteoir an toirchiú sa rang bitheolaíochta.
The teacher explained fertilization in the biology class.
Is céim thábhachtach é toirchiú i saol an phlanda.
Fertilization is an important stage in a plant's life.
Rinneadh an toirchiú sa tsaotharlann.
The fertilization was done in the laboratory.
Bíonn feithidí ag cabhrú le toirchiú bláthanna.
Insects help with the fertilization of flowers.
Tar éis an toirchithe fásann an suth.
After fertilization the embryo grows.
Tá staidéar á dhéanamh aici ar thoirchiú in vitro.
She is studying in vitro fertilization.

Other nouns in Irish

More everyday Irish nouns to learn next.

Fertilization in Irish: frequently asked questions

What is the Irish for fertilization?

The Irish for fertilization is toirchiú (pronounced “TIR-ih-khoo”). It’s a masculine noun.

How do you pronounce toirchiú in Irish?

Toirchiú is said like “TIR-ih-khoo” (IPA /ˈt̪ˠɛɾʲəxuː/).

Does toirchiú have a plural?

No plural form is given for toirchiú in the standard. Many abstract and mass nouns in Irish have no plural.

Why does toirchiú change to thoirchiú or dtoirchiú?

Irish changes the start of some words after certain words. After mo (my) toirchiú becomes mo thoirchiú (lenition), and after ár (our) or i (in) it becomes ár dtoirchiú (eclipsis).

What is the difference between toirchiú and toircheas?

Toirchiú is the act of fertilizing or impregnating, while toircheas means pregnancy, the state of carrying a child.

Is toirchiú used for fertilizing soil?

No, for spreading fertilizer on land use leasú; toirchiú refers to biological fertilization of eggs or plants.

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