HeyRua Get the app

Menstruation in Irish (Míostrú): Meaning, Pronunciation, Usage

The Irish for menstruation is míostrú, a masculine noun. Ag míostrú is menstruating, from the verb míostraigh.
Updated October 2026Report a mistake

How to say “menstruation” in Irish

Irish:
míostrú
English:
menstruation
Word type:
noun (verbal noun)
Verbal noun of:
míostraigh, to menstruate (ag míostrú, menstruating)
Gender:
masculine
Pronunciation:
“MEES-troo”  /ˈmʲiːsˠt̪ˠɾˠuː/
Various forms
Genitive singular:
míostraithe, an mhíostraithe (e.g. pian míostraithe, menstrual pain)

What does “míostrú” mean?

menstruation
The monthly bleeding from the womb; it is also the verbal noun of the verb míostraigh, to menstruate.Also: period, menses, menstruating.

“Míostrú” as a verbal noun

After ag, míostrú means menstruating: it is the verbal noun of the verb míostraigh (to menstruate). A noun that follows it goes into the genitive.

agat
+
míostrúverbal noun
=
ag míostrúmenstruating

“Míostrú” with the article

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

an míostrú
the menstruation
No change after an

“Míostrú” in a sentence: Irish examples

Common Irish sentences using míostrú, the Irish word for menstruation.

Is próiseas nádúrtha é an míostrú.
Menstruation is a natural process.
Thosaigh an míostrú aici nuair a bhí sí dhá bhliain déag.
Her periods started when she was twelve.
Bíonn pian míostraithe go dona aici gach mí.
She gets bad period pain every month.
Labhair an dochtúir faoin míostrú sa rang.
The doctor talked about menstruation in the class.
Tá an timthriall míostraithe thart ar ocht lá is fiche.
The menstrual cycle is about twenty-eight days.
Stopann an míostrú le linn toirchis.
Menstruation stops during pregnancy.
Bíonn tuirse uirthi le linn míostraithe.
She feels tired during her period.

Other nouns in Irish

More everyday Irish nouns to learn next.

Menstruation in Irish: frequently asked questions

What is the Irish for menstruation?

The Irish for menstruation is míostrú (pronounced “MEES-troo”). It’s a masculine noun.

How do you pronounce míostrú in Irish?

Míostrú is said like “MEES-troo” (IPA /ˈmʲiːsˠt̪ˠɾˠuː/).

Does míostrú have a plural?

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

Why does míostrú change to mhíostrú?

After words like mo (my) and do (your) the first letter is lenited: mo mhíostrú. After ár (our) it stays ár míostrú, because m does not take eclipsis.

How do people say 'period' informally in Irish?

Míostrú is the standard term; informally people may say 'tá an mhí orm' or use 'fuil mhíosta'.

Learn Irish by
actually speaking it

Learn everyday Irish words like míostrú through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen