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Velocity in Irish (Treoluas): Meaning, Pronunciation, Usage

The Irish for velocity is treoluas, a masculine noun (plural treoluasanna).
Updated October 2026Report a mistake

How to say “velocity” in Irish

Irish:
treoluas
English:
velocity
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“TROH-loo-uss”  /ˈtɾʲoːl̪ˠuəsˠ/
Various forms
Plural:
treoluasanna (velocities)
Genitive singular:
treoluais, an treoluais (e.g. athrú an treoluais, the change in velocity)
Genitive plural:
treoluasanna, na dtreoluasanna (e.g. comparáid na dtreoluasanna, a comparison of the velocities)

What does “treoluas” mean?

velocity
Speed in a particular direction, used especially in physics.Also: speed in a direction, directional speed.

Other Irish words for velocity: luas (speed)

“Treoluas” with the article

The plural of velocity in Irish is treoluasanna. Here is treoluas after the article (an t-alt), in the singular and the plural.

an treoluas
the velocity
No change after an
na treoluasanna
the velocities
Plural: no change after na

“Treoluas” in a sentence: Irish examples

Common Irish sentences using treoluas, the Irish word for velocity.

Is veicteoir é treoluas.
Velocity is a vector.
Ríomh an treoluas tar éis deich soicind.
Calculate the velocity after ten seconds.
Tá treoluas an chairr ag méadú.
The car's velocity is increasing.
Is é luasghéarú ráta athraithe an treoluais.
Acceleration is the rate of change of velocity.
Cuir an dá threoluas i gcomparáid lena chéile.
Compare the two velocities.
Tomhaistear treoluas i méadair sa soicind.
Velocity is measured in metres per second.
Tá na treoluasanna difriúil sa dá thurgnamh.
The velocities are different in the two experiments.

Other nouns in Irish

More everyday Irish nouns to learn next.

Velocity in Irish: frequently asked questions

What is the Irish for velocity?

The Irish for velocity is treoluas (pronounced “TROH-loo-uss”). It’s a masculine noun and the plural is treoluasanna.

How do you pronounce treoluas in Irish?

Treoluas is said like “TROH-loo-uss” (IPA /ˈtɾʲoːl̪ˠuəsˠ/).

What is the plural of velocity in Irish?

The plural of treoluas is treoluasanna; with the article, na treoluasanna means “the velocities”. The genitive plural is treoluasanna, as in comparáid na dtreoluasanna (a comparison of the velocities).

Why does treoluas change to threoluas or dtreoluas?

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

What is the difference between 'luas' and 'treoluas'?

'Luas' is speed in general, while 'treoluas' is velocity, speed with a direction, as used in physics.

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