accuis

Old Irish

accuis f

Feminine n-stem
	Singular	Dual	Plural
Nominative	accuis	aicsin^L	aicsin
Vocative	accuis	aicsin^L	aicsena^H
Accusative	aicsin^N	aicsin^L	aicsena^H
Genitive	aicsen	aicsen^L	aicsen^N
Dative	aicsin^L, accuis^L	aicsenaib	aicsenaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

From ad- + Proto-Celtic *kassis (“hatred”).^[1]

accuis f (nominative plural acsi)

Feminine i-stem
	Singular	Dual	Plural
Nominative	accuis	accuis^L	aicsi^H
Vocative	accuis	accuis^L	aicsi^H
Accusative	accuis^N	accuis^L	aicsi^H
Genitive	aicseo^H, aicsea^H	aicseo^H, aicsea^H	aicse^N
Dative	accuis^L	aicsib	aicsib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

Middle Irish: accais, acaiss, acuis (“cause; offense; hatred; venom”)
- Irish: aicis, acais (“venom, spite”)

Old Irish mutation
Radical	Lenition	Nasalization
accuis (pronounced with /h/ in h-prothesis environments)	unchanged	n-accuis
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

^ Griffith, Aaron (2022 February 26) “On the old Irish third palatalisation and the 3sg. present of the copula”, in Ériu‎^[1], volume 66, number 1, →DOI, →ISSN, retrieved June 22, 2022, pages 39–62