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Widening in Irish (Leathnú): Meaning, Pronunciation, Usage

‘leathnú’ also means: dilation

The Irish for widening is leathnú, a masculine noun. Ag leathnú is widening, from the verb leathnaigh.
Updated October 2026Report a mistake

How to say “widening” in Irish

Irish:
leathnú
English:
widening, dilation
Word type:
noun (verbal noun)
Verbal noun of:
leathnaigh, to widen (ag leathnú, widening)
Gender:
masculine
Pronunciation:
“LA-noo”  /ˈl̠ʲahn̪ˠuː/
Various forms
Genitive singular:
leathnaithe, an leathnaithe (e.g. obair leathnaithe an bhóthair, the road-widening work)

What does “leathnú” mean?

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

widening
The verbal noun of leathnaigh: the act of making something wider, broader or larger in extent.Also: broadening, expansion, extension, spreading.
1 other meaning: dilation
2dilation
An opening out or swelling, as of the pupil of the eye or a blood vessel.Also: dilatation, distension.

“Leathnú” as a verbal noun

After ag, leathnú means widening: it is the verbal noun of the verb leathnaigh (to widen). A noun that follows it goes into the genitive.

agat
+
leathnúverbal noun
=
ag leathnúwidening

“Leathnú” with the article

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

an leathnú
the widening
No change after an

“Leathnú” in a sentence: Irish examples

Common Irish sentences using leathnú, the Irish word for widening.

Tá leathnú á dhéanamh ar an mbóthar.
The road is being widened.
Cuireadh tús leis an leathnú inné.
The widening started yesterday.
Beidh costas mór ar leathnú an droichid.
Widening the bridge will be very expensive.
Tá plean leathnaithe ag an gcomhlacht.
The company has an expansion plan.
Bhí leathnú mór ar an ngnó anuraidh.
The business expanded a lot last year.
Tá siad i gcoinne leathnú an aerfoirt.
They are against the airport expansion.
Thug an dochtúir faoi deara leathnú sna súile.
The doctor noticed dilation in the eyes.

Other nouns in Irish

More everyday Irish nouns to learn next.

Widening in Irish: frequently asked questions

What is the Irish for widening?

The Irish for widening is leathnú (pronounced “LA-noo”). It’s a masculine noun. Depending on context it can also mean dilation.

How do you pronounce leathnú in Irish?

Leathnú is said like “LA-noo” (IPA /ˈl̠ʲahn̪ˠuː/).

Does leathnú have a plural?

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

Does leathnú have more than one meaning?

Yes. Leathnú can mean widening or dilation, depending on context; the first is the most common.

What is the difference between leathnú and fairsingiú?

Both can mean widening or expansion; leathnú stresses breadth (leathan, wide), while fairsingiú stresses making something roomier or more extensive.

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