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Diffusion in Irish (Idirleathadh): Meaning, Pronunciation, Usage

The Irish for diffusion is idirleathadh, a masculine noun. Ag idirleathadh is diffusing, from the verb idirleath.
Updated October 2026Report a mistake

How to say “diffusion” in Irish

Irish:
idirleathadh
English:
diffusion
Word type:
noun (verbal noun)
Verbal noun of:
idirleath, to diffuse (ag idirleathadh, diffusing)
Gender:
masculine
Pronunciation:
“IH-dir-lya-hoo”  /ˈɪdʲəɾʲˌlʲahə/
Various forms
Genitive singular:
idirleata, an idirleata (e.g. ráta idirleata, rate of diffusion)

What does “idirleathadh” mean?

diffusion
The spreading of a substance, such as a gas or liquid, through another; it is the verbal noun of the verb idirleath.Also: diffusing, spreading, dispersal.

“Idirleathadh” as a verbal noun

After ag, idirleathadh means diffusing: it is the verbal noun of the verb idirleath (to diffuse). A noun that follows it goes into the genitive.

agat
+
idirleathadhverbal noun
=
ag idirleathadhdiffusing

“Idirleathadh” with the article

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

an t-idirleathadh
the diffusion
Masculine nouns take t before a vowel after an

“Idirleathadh” in a sentence: Irish examples

Common Irish sentences using idirleathadh, the Irish word for diffusion.

Is próiseas nádúrtha é idirleathadh.
Diffusion is a natural process.
Tharla idirleathadh an gháis tríd an seomra.
The gas diffused through the room.
D'fhoghlaimíomar faoin idirleathadh sa rang eolaíochta.
We learned about diffusion in science class.
Bíonn ráta idirleata níos tapúla nuair a bhíonn sé te.
The rate of diffusion is faster when it is warm.
Gluaiseann ocsaigin isteach sa chill trí idirleathadh.
Oxygen moves into the cell by diffusion.
Rinne an múinteoir turgnamh ar idirleathadh dúch in uisce.
The teacher did an experiment on ink diffusing in water.
Míníonn an leabhar prionsabal an idirleata go soiléir.
The book explains the principle of diffusion clearly.

Other nouns in Irish

More everyday Irish nouns to learn next.

Diffusion in Irish: frequently asked questions

What is the Irish for diffusion?

The Irish for diffusion is idirleathadh (pronounced “IH-dir-lya-hoo”). It’s a masculine noun.

How do you pronounce idirleathadh in Irish?

Idirleathadh is said like “IH-dir-lya-hoo” (IPA /ˈɪdʲəɾʲˌlʲahə/).

Does idirleathadh have a plural?

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

Why does idirleathadh sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-idirleathadh (the diffusion), a hidirleathadh (her diffusion), a n-idirleathadh (their diffusion).

How is idirleathadh different from osmóis?

Idirleathadh is the general spreading of particles from high to low concentration, while osmóis is the specific movement of water across a membrane.

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