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Deviation in Irish (Diallas): Meaning, Pronunciation, Usage

The Irish for deviation is diallas, a masculine noun (plural diallais).
Updated October 2026Report a mistake

How to say “deviation” in Irish

Irish:
diallas
English:
deviation
Word type:
noun
Gender:
masculine
Pronunciation:
“JEE-uh-lus”  /ˈdʲiəl̪ˠəsˠ/
Various forms
Plural:
diallais (deviations)
Genitive singular:
diallais, an diallais (e.g. ceartú an diallais, the correction of the deviation)
Genitive plural:
diallas, na ndiallas (e.g. cúiseanna na ndiallas, the causes of the deviations)

What does “diallas” mean?

deviation
A turning aside or departure from a set course, standard or norm.Also: departure, divergence, aberration.

“Diallas” with the article

The plural of deviation in Irish is diallais. Here is diallas after the article (an t-alt), in the singular and the plural.

an diallas
the deviation
No change after an
na diallais
the deviations
Plural: no change after na

“Diallas” in a sentence: Irish examples

Common Irish sentences using diallas, the Irish word for deviation.

Ní raibh aon diallas ón bplean.
There was no deviation from the plan.
Tomhaiseadh an diallas go cúramach.
The deviation was measured carefully.
Ba bheag é méid an diallais.
The extent of the deviation was small.
Fuarthas roinnt diallas sna torthaí.
Some deviations were found in the results.
Tá diallas beag sa chompás.
There is a slight deviation in the compass.
Ní ghlacfar le diallais ón gcaighdeán.
Deviations from the standard will not be accepted.
Míníodh cúis an diallais dúinn.
The cause of the deviation was explained to us.

Other nouns in Irish

More everyday Irish nouns to learn next.

Deviation in Irish: frequently asked questions

What is the Irish for deviation?

The Irish for deviation is diallas (pronounced “JEE-uh-lus”). It’s a masculine noun and the plural is diallais.

How do you pronounce diallas in Irish?

Diallas is said like “JEE-uh-lus” (IPA /ˈdʲiəl̪ˠəsˠ/).

What is the plural of deviation in Irish?

The plural of diallas is diallais; with the article, na diallais means “the deviations”. The genitive plural is diallas, as in cúiseanna na ndiallas (the causes of the deviations).

Why does diallas change to dhiallas or ndiallas?

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

How do I say 'standard deviation' in Irish?

In statistics 'standard deviation' is 'diallas caighdeánach'.

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