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Wave in Irish (Tonn): Meaning, Pronunciation, Usage

‘tonn’ also means: wave (physics) · surge

The Irish for wave is tonn, a feminine noun (plural tonnta).
Updated October 2026Report a mistake

How to say “wave” in Irish

Irish:
tonn
English:
wave, wave (physics), surge
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“towne”  /t̪ˠɑun̪ˠ/
Various forms
Plural:
tonnta (waves)
Genitive singular:
toinne, na toinne (e.g. barr na toinne, the crest of the wave)
Genitive plural:
tonnta, na dtonnta (e.g. fuaim na dtonnta, the sound of the waves)

What does “tonn” mean?

“Tonn” has three alternative meanings. The most common comes first.

wave
A ridge of water moving across the surface of the sea or a lake.Also: billow, breaker, sea wave.
2 other meanings: wave (physics) or surge
2wave (physics)
A wave of energy such as sound, light or radio, as in physics.Also: wave, sound wave, radio wave.
3surge
A sudden wave or surge of something, such as a feeling or a crowd.Also: wave, flood.

“Tonn” with the article

The plural of wave in Irish is tonnta. Here is tonn after the article (an t-alt), in the singular and the plural.

an tonn
the wave
No change: d and t are not lenited after an
na tonnta
the waves
Plural: no change after na

“Tonn” in a sentence: Irish examples

Common Irish sentences using tonn, the Irish word for wave.

Bhuail tonn mhór an bád.
A big wave hit the boat.
Tá na tonnta an-ard inniu.
The waves are very high today.
Is breá liom fuaim na dtonnta san oíche.
I love the sound of the waves at night.
Sheas sé ar bharr na toinne ar a chlár.
He stood on top of the wave on his board.
Bhris an tonn ar na carraigeacha.
The wave broke on the rocks.
Fliuchadh mo chosa sna tonnta.
My feet got wet in the waves.
Bhí tonnta móra ag teacht isteach ar an trá.
Big waves were coming in on the beach.

Other nouns in Irish

More everyday Irish nouns to learn next.

Wave in Irish: frequently asked questions

What is the Irish for wave?

The Irish for wave is tonn (pronounced “towne”). It’s a feminine noun and the plural is tonnta. Depending on context it can also mean wave (physics) or surge.

How do you pronounce tonn in Irish?

Tonn is said like “towne” (IPA /t̪ˠɑun̪ˠ/).

What is the plural of wave in Irish?

The plural of tonn is tonnta; with the article, na tonnta means “the waves”. The genitive plural is tonnta, as in fuaim na dtonnta (the sound of the waves).

Does tonn have more than one meaning?

Yes. Tonn can mean wave, wave (physics) or surge, depending on context; the first is the most common.

Why does tonn change to thonn or dtonn?

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

How do I say 'heatwave' in Irish?

A heatwave is 'tonn teaspaigh', literally a wave of heat.

Is 'tonn' used for waving your hand?

No, 'tonn' is a wave of water or energy; for waving a hand you use the verb 'croith', as in 'chroith sé a lámh'.

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