-acht

See also: acht, Acht, ächt, and åcht

Irish

Alternative forms

-eacht (slender variant)
-ocht (following 'í')

Etymology

From Old Irish -acht (compare Scottish Gaelic -achd).

Suffix

-acht f

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

Usage notes

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

Abstract nouns:

Declension of -acht

Third declension

Bare forms (no plural for this noun):

Case	Singular
Nominative	-acht
Vocative	a -acht
Genitive	-achta
Dative	-acht

Forms with the definite article:

Case	Singular
Nominative	an -acht
Genitive	na -achta
Dative	leis an -acht don -acht

Concrete nouns:

Declension of -acht

Third declension

Bare forms:

Case	Singular	Plural
Nominative	-acht	-achtaí
Vocative	a -acht	a -achtaí
Genitive	-achta	-achtaí
Dative	-acht	-achtaí

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

Derived terms

► <a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Irish_words_suffixed_with_-acht' title='Category:Irish words suffixed with -acht'>Irish words suffixed with -acht</a>

Old Irish

Etymology

From Insular Celtic *-axtā, suffixal use of Proto-Celtic *axtā

Suffix

-acht f

-ness, -hood; forms abstract nouns.

Usage notes

After a palatalised consonant, the suffix becomes -echt.

Inflection

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

Derived terms

► <a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Old_Irish_words_suffixed_with_-acht' title='Category:Old Irish words suffixed with -acht'>Old Irish words suffixed with -acht</a>

Descendants

Irish: -acht
Manx: -aght
Scottish Gaelic: -achd

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