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Swearing in Irish (Mionnú): Meaning, Pronunciation, Usage

The Irish for swearing is mionnú, a masculine noun. Ag mionnú is swearing, from the verb mionnaigh.
Updated October 2026Report a mistake

How to say “swearing” in Irish

Irish:
mionnú
English:
swearing
Word type:
noun (verbal noun)
Verbal noun of:
mionnaigh, to swear (ag mionnú, swearing)
Gender:
masculine
Pronunciation:
“MIN-oo”  /ˈmʲɪn̪ˠuː/
Various forms
Genitive singular:
mionnaithe, an mhionnaithe (e.g. lá an mhionnaithe, the day of the swearing-in)

What does “mionnú” mean?

swearing
The act of taking an oath or swearing something; it is the verbal noun of the verb 'mionnaigh'.Also: swearing an oath, taking an oath, attestation.

Other Irish words for swearing: eascainí (cursing)

“Mionnú” as a verbal noun

After ag, mionnú means swearing: it is the verbal noun of the verb mionnaigh (to swear). A noun that follows it goes into the genitive.

agat
+
mionnúverbal noun
=
ag mionnúswearing

“Mionnú” with the article

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

an mionnú
the swearing
No change after an

“Mionnú” in a sentence: Irish examples

Common Irish sentences using mionnú, the Irish word for swearing.

Bhí mionnú an fhinné tábhachtach sa chás.
The witness's swearing was important in the case.
Tharla an mionnú os comhair an bhreithimh.
The swearing took place before the judge.
Is ar an mBíobla a dhéantar an mionnú.
The oath is sworn on the Bible.
Bhí searmanas mionnaithe ann don Uachtarán nua.
There was a swearing-in ceremony for the new President.
Ní raibh gá le mionnú sa chás sin.
There was no need for swearing an oath in that case.
Tar éis an mhionnaithe, thosaigh sé ag obair.
After the swearing-in, he started working.
Ghlac sí páirt i mionnú an ghiúiré.
She took part in the swearing of the jury.

Other nouns in Irish

More everyday Irish nouns to learn next.

Swearing in Irish: frequently asked questions

What is the Irish for swearing?

The Irish for swearing is mionnú (pronounced “MIN-oo”). It’s a masculine noun.

How do you pronounce mionnú in Irish?

Mionnú is said like “MIN-oo” (IPA /ˈmʲɪn̪ˠuː/).

Does mionnú have a plural?

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

Why does mionnú change to mhionnú?

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

What is the difference between 'mionnú' and 'mionn'?

'Mionn' is the oath itself, while 'mionnú' is the act of swearing it, the verbal noun of 'mionnaigh'. Note that swearing in the sense of cursing is usually 'eascainí'.

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