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Wave motion in Irish (Tonnghluaiseacht): Meaning, Pronunciation, Usage

The Irish for wave motion is tonnghluaiseacht, a feminine noun (plural tonnghluaiseachtaí).
Updated October 2026Report a mistake

How to say “wave motion” in Irish

Irish:
tonnghluaiseacht
English:
wave motion
Word type:
noun
Gender:
feminine
Pronunciation:
“TUN-ghloo-ish-akht”  /ˈt̪ˠɔn̪ˠˌɣl̪ˠuəʃəxt̪ˠ/
Various forms
Plural:
tonnghluaiseachtaí (wave motions)
Genitive singular:
tonnghluaiseachta, na tonnghluaiseachta (e.g. teoiric na tonnghluaiseachta, the theory of wave motion)
Genitive plural:
tonnghluaiseachtaí, na dtonnghluaiseachtaí (e.g. staidéar na dtonnghluaiseachtaí, the study of wave motions)

What does “tonnghluaiseacht” mean?

wave motion
The movement of energy through a medium in the form of waves, as studied in physics.Also: undulation, wave movement, undulatory motion.

“Tonnghluaiseacht” with the article

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

an tonnghluaiseacht
the wave motion
No change: d and t are not lenited after an
na tonnghluaiseachtaí
the wave motions
Plural: no change after na

“Tonnghluaiseacht” in a sentence: Irish examples

Common Irish sentences using tonnghluaiseacht, the Irish word for wave motion.

Is cineál tonnghluaiseachta í an fhuaim.
Sound is a kind of wave motion.
Mhínigh an múinteoir an tonnghluaiseacht dúinn inniu.
The teacher explained wave motion to us today.
Tá caibidil ar thonnghluaiseacht sa leabhar fisice.
There is a chapter on wave motion in the physics book.
Bíonn tonnghluaiseacht le feiceáil ar uisce an locha.
Wave motion can be seen on the water of the lake.
Rinneamar turgnamh ar thonnghluaiseachtaí sa tsaotharlann.
We did an experiment on wave motions in the lab.
Tá airíonna na tonnghluaiseachta ar an gcúrsa.
The properties of wave motion are on the course.
Is tonnghluaiseacht é an solas freisin.
Light is also a wave motion.

Other nouns in Irish

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Wave motion in Irish: frequently asked questions

What is the Irish for wave motion?

The Irish for wave motion is tonnghluaiseacht (pronounced “TUN-ghloo-ish-akht”). It’s a feminine noun and the plural is tonnghluaiseachtaí.

How do you pronounce tonnghluaiseacht in Irish?

Tonnghluaiseacht is said like “TUN-ghloo-ish-akht” (IPA /ˈt̪ˠɔn̪ˠˌɣl̪ˠuəʃəxt̪ˠ/).

What is the plural of wave motion in Irish?

The plural of tonnghluaiseacht is tonnghluaiseachtaí; with the article, na tonnghluaiseachtaí means “the wave motions”. The genitive plural is tonnghluaiseachtaí, as in staidéar na dtonnghluaiseachtaí (the study of wave motions).

Why does tonnghluaiseacht change to thonnghluaiseacht or dtonnghluaiseacht?

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

How is tonnghluaiseacht formed?

It combines tonn (wave) and gluaiseacht (movement), with lenition of the g after tonn, giving tonnghluaiseacht.

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