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Tithe in Irish (Deachú): Meaning, Pronunciation, Usage

‘deachú’ also means: tenth

The Irish for tithe is deachú, a feminine noun (plural deachúna).
Updated October 2026Report a mistake

How to say “tithe” in Irish

Irish:
deachú
English:
tithe, tenth
Word type:
noun
Gender:
feminine, fifth declension
Pronunciation:
“DYAKH-oo”  /ˈdʲaxuː/
Various forms
Plural:
deachúna (tithes)
Genitive singular:
deachún, na deachún (e.g. cogadh na deachún, the Tithe War)
Genitive plural:
deachúna, na ndeachúna (e.g. íoc na ndeachúna, the payment of the tithes)

What does “deachú” mean?

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

tithe
A tenth part of income or produce paid to support the church or clergy.Also: church tax, tenth.
1 other meaning: tenth
2tenth
A tenth part of something.Also: tenth part, one tenth.

“Deachú” with the article

The plural of tithe in Irish is deachúna. Here is deachú after the article (an t-alt), in the singular and the plural.

an deachú
the tithe
No change: d and t are not lenited after an
na deachúna
the tithes
Plural: no change after na

“Deachú” in a sentence: Irish examples

Common Irish sentences using deachú, the Irish word for tithe.

Bhí ar na feirmeoirí deachú a íoc leis an eaglais.
The farmers had to pay a tithe to the church.
Ba chúis mhór feirge an deachú i measc na mbochtán.
The tithe was a great cause of anger among the poor.
Thosaigh Cogadh na Deachún sna tríochaidí.
The Tithe War began in the thirties.
Diúltaíodh na deachúna a íoc in go leor paróistí.
People refused to pay the tithes in many parishes.
Thug sé deachú dá thuarastal don charthanas.
He gave a tenth of his salary to charity.
Cuireadh deireadh leis an deachú in Éirinn sa bhliain 1869.
The tithe was abolished in Ireland in 1869.
Léigh mé faoi stair na ndeachúna ar scoil.
I read about the history of tithes at school.

Other nouns in Irish

More everyday Irish nouns to learn next.

Tithe in Irish: frequently asked questions

What is the Irish for tithe?

The Irish for tithe is deachú (pronounced “DYAKH-oo”). It’s a feminine noun and the plural is deachúna. Depending on context it can also mean tenth.

How do you pronounce deachú in Irish?

Deachú is said like “DYAKH-oo” (IPA /ˈdʲaxuː/).

What is the plural of tithe in Irish?

The plural of deachú is deachúna; with the article, na deachúna means “the tithes”. The genitive plural is deachúna, as in íoc na ndeachúna (the payment of the tithes).

Does deachú have more than one meaning?

Yes. Deachú can mean tithe or tenth, depending on context; the first is the most common.

Why does deachú change to dheachú or ndeachú?

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

Is 'deachú' the same as 'deichiú'?

No: 'deichiú' is the ordinary word for 'tenth' (an deichiú lá), while 'deachú' mainly means a tithe, a tenth paid to the church.

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