-acht

See also: acht, Acht, ächt, and åcht

Irish

-acht f

Nominal suffix, used to form abstract ideas or nouns roughly corresponding to English -ness, -hood, -ity, or -ure.

This affix forms feminine nouns of the third declension. Abstract nouns do not have plural forms; however, concepts that refer to concrete items do have plurals in -aí.

Declension of -acht (third declension, no plural)

forms with the definite article
case	singular
nominative	an -acht
genitive	na -achta
dative	leis an -acht don -acht

Declension of -acht (third declension)

forms with the definite article
case	singular	plural
nominative	an -acht	na -achtaí
genitive	na -achta	na -achtaí
dative	leis an -acht don -acht	leis na -achtaí

-acht f

After a palatalised consonant, the suffix becomes -echt.

Feminine ā-stem
	Singular	Dual	Plural
Nominative	-acht^L	-acht^L	-achta^H
Vocative	-acht^L	-acht^L	-achta^H
Accusative	-acht^N	-acht^L	-achta^H
Genitive	-achtae^H	-acht^L	-acht^N
Dative	-acht^L	-achtaib	-achtaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization