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Thickness in Irish (Tiús): Meaning, Pronunciation, Usage

‘tiús’ also means: density

The Irish for thickness is tiús, a masculine noun (plural tiúis).
Updated October 2026Report a mistake

How to say “thickness” in Irish

Irish:
tiús
English:
thickness, density
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“tchoos”  /tʲuːsˠ/
Various forms
Plural:
tiúis
Genitive singular:
tiúis, an tiúis (e.g. tomhas an tiúis, the measurement of the thickness)
Genitive plural:
tiús, na dtiús (e.g. tomhais na dtiús, the measurements of the thicknesses)

What does “tiús” mean?

“Tiús” has two alternative meanings. The most common comes first.

thickness
How thick something is, or the measure of the distance through it from one side to the other.Also: depth, density.
1 other meaning: density
2density
The quality of being thick or dense, as of a liquid, fog, hair or a crowd.Also: denseness, thickness.

Other Irish words for thickness: tiúspás (thickness)

“Tiús” with the article

The plural of thickness in Irish is tiúis. Here is tiús after the article (an t-alt), in the singular and the plural.

an tiús
the thickness
No change after an
na tiúis
the thickness (plural)
Plural: no change after na

“Tiús” in a sentence: Irish examples

Common Irish sentences using tiús, the Irish word for thickness.

Cén tiús atá san adhmad seo?
How thick is this wood?
Tá tiús an bhalla thart ar mhéadar.
The wall is about a metre thick.
Thomhais sé tiús an oighir ar an loch.
He measured the thickness of the ice on the lake.
Chuir tiús an cheo moill orainn.
The thickness of the fog delayed us.
Tá tiús breá i do chuid gruaige.
Your hair is lovely and thick.
Gearr an t-arán ar thiús orlaigh.
Cut the bread an inch thick.
Bhí na cláir ar thiúis éagsúla.
The boards were of different thicknesses.

Other nouns in Irish

More everyday Irish nouns to learn next.

Thickness in Irish: frequently asked questions

What is the Irish for thickness?

The Irish for thickness is tiús (pronounced “tchoos”). It’s a masculine noun and the plural is tiúis. Depending on context it can also mean density.

How do you pronounce tiús in Irish?

Tiús is said like “tchoos” (IPA /tʲuːsˠ/).

What is the plural of thickness in Irish?

The plural of tiús is tiúis; with the article, it is na tiúis. The genitive plural is tiús, as in tomhais na dtiús (the measurements of the thicknesses).

Does tiús have more than one meaning?

Yes. Tiús can mean thickness or density, depending on context; the first is the most common.

Why does tiús change to thiús or dtiús?

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

How do I say something is a certain thickness?

Use 'ar thiús': 'ar thiús ceintiméadair' means one centimetre thick. You can also ask 'Cén tiús atá ann?' for 'How thick is it?'.

Is 'tiús' related to the adjective 'tiubh'?

Yes, 'tiús' is the noun formed from 'tiubh' (thick), just as 'tanaíocht' comes from 'tanaí' (thin).

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