domun

Old Irish

From Proto-Celtic *dubnos (“the deep; the world”) (compare Welsh dwfn (“deep, depth; the world”)), from Proto-Indo-European *dʰewbʰ- (“deep, hollow”).

domun m

Masculine o-stem
	Singular	Dual	Plural
Nominative	domun	domun^L	domuin^L
Vocative	domuin	domun^L	domnu^H
Accusative	domun^N	domun^L	domnu^H
Genitive	domuin^L	domun	domun^N
Dative	domun^L	domnaib	domnaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

Old Irish mutation
Radical	Lenition	Nasalization
domun	domun pronounced with /ð(ʲ)-/	ndomun
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.