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Transpiration in Irish (Tréghalú): Meaning, Pronunciation, Usage

The Irish for transpiration is tréghalú, a masculine noun.
Updated October 2026Report a mistake

How to say “transpiration” in Irish

Irish:
tréghalú
English:
transpiration
Word type:
noun (verbal noun)
Gender:
masculine
Pronunciation:
“TRAY-ghal-oo”  /ˈtʲɾʲeːɣəlˠuː/
Various forms
Genitive singular:
tréghalaithe, an tréghalaithe (e.g. ráta an tréghalaithe, the rate of transpiration)

What does “tréghalú” mean?

transpiration
The process by which plants give off water vapour through their leaves; it is the verbal noun of the verb tréghalaigh.Also: plant evaporation, water loss in plants.

“Tréghalú” with the article

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

an tréghalú
the transpiration
No change after an

“Tréghalú” in a sentence: Irish examples

Common Irish sentences using tréghalú, the Irish word for transpiration.

Is próiseas tábhachtach i bplandaí é tréghalú.
Transpiration is an important process in plants.
Cailleann an planda uisce trí thréghalú.
The plant loses water through transpiration.
Méadaíonn an teas ráta an tréghalaithe.
Heat increases the rate of transpiration.
Tarlaíonn an tréghalú den chuid is mó sna duilleoga.
Transpiration happens mostly in the leaves.
Rinneamar turgnamh ar thréghalú sa rang eolaíochta.
We did an experiment on transpiration in science class.
Laghdaíonn an ghaoth chiúin an tréghalú.
Calm air reduces transpiration.
Mínigh céimeanna an tréghalaithe sa scrúdú.
Explain the stages of transpiration in the exam.

Other nouns in Irish

More everyday Irish nouns to learn next.

Transpiration in Irish: frequently asked questions

What is the Irish for transpiration?

The Irish for transpiration is tréghalú (pronounced “TRAY-ghal-oo”). It’s a masculine noun.

How do you pronounce tréghalú in Irish?

Tréghalú is said like “TRAY-ghal-oo” (IPA /ˈtʲɾʲeːɣəlˠuː/).

Does tréghalú have a plural?

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

Why does tréghalú change to thréghalú or dtréghalú?

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

How is tréghalú different from galú?

Galú is evaporation in general, while tréghalú is specifically the giving off of water vapour by plants through their leaves.

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