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Deduction in Irish (Déaduchtú): Meaning, Pronunciation, Usage

The Irish for deduction is déaduchtú, a masculine noun (plural déaduchtuithe).
Updated October 2026Report a mistake

How to say “deduction” in Irish

Irish:
déaduchtú
English:
deduction
Word type:
noun (verbal noun)
Gender:
masculine
Pronunciation:
“DAY-uh-dukh-too”  /dʲeːd̪ˠəxt̪ˠuː/
Various forms
Plural:
déaduchtuithe (deductions)
Genitive singular:
déaduchtaithe, an déaduchtaithe (e.g. rialacha an déaduchtaithe, the rules of deduction)
Genitive plural:
déaduchtuithe, na ndéaduchtuithe (e.g. sraith na ndéaduchtuithe, the series of deductions)

What does “déaduchtú” mean?

deduction
In logic, the process of reasoning from general principles to a specific conclusion; it is the verbal noun of the verb 'déaduchtaigh' (deduce).Also: deducing, deductive reasoning, inference.

“Déaduchtú” with the article

The plural of deduction in Irish is déaduchtuithe. Here is déaduchtú after the article (an t-alt), in the singular and the plural.

an déaduchtú
the deduction
No change after an
na déaduchtuithe
the deductions
Plural: no change after na

“Déaduchtú” in a sentence: Irish examples

Common Irish sentences using déaduchtú, the Irish word for deduction.

Is cineál réasúnaíochta é an déaduchtú.
Deduction is a kind of reasoning.
Bhain sé an tátal sin amach trí dhéaduchtú.
He reached that conclusion through deduction.
Tá an déaduchtú an-tábhachtach sa mhatamaitic.
Deduction is very important in mathematics.
Mhínigh an léachtóir modh an déaduchtaithe dúinn.
The lecturer explained the method of deduction to us.
Bhí na déaduchtuithe go léir loighciúil.
All the deductions were logical.
Ní raibh aon locht ar a dhéaduchtú.
There was no flaw in his deduction.
Foghlaimímid faoi ionduchtú agus déaduchtú sa chúrsa fealsúnachta.
We learn about induction and deduction in the philosophy course.

Other nouns in Irish

More everyday Irish nouns to learn next.

Deduction in Irish: frequently asked questions

What is the Irish for deduction?

The Irish for deduction is déaduchtú (pronounced “DAY-uh-dukh-too”). It’s a masculine noun and the plural is déaduchtuithe.

How do you pronounce déaduchtú in Irish?

Déaduchtú is said like “DAY-uh-dukh-too” (IPA /dʲeːd̪ˠəxt̪ˠuː/).

What is the plural of deduction in Irish?

The plural of déaduchtú is déaduchtuithe; with the article, na déaduchtuithe means “the deductions”. The genitive plural is déaduchtuithe, as in sraith na ndéaduchtuithe (the series of deductions).

Why does déaduchtú change to dhéaduchtú or ndéaduchtú?

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

Does 'déaduchtú' mean a deduction from wages?

No, 'déaduchtú' is the logical sense of deduction; a deduction from pay or tax is usually 'asbhaint'.

What is the opposite of 'déaduchtú'?

The opposite reasoning process, induction, is 'ionduchtú'.

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