míad

Old Irish

According to Pokorny, from Proto-Indo-European *(s)mey- (“to be glad”).[1]

míad n or m

Neuter o-stem
	Singular	Dual	Plural
Nominative	míad^N	míad^N	míad^L, míada
Vocative	míad^N	míad^N	míad^L, míada
Accusative	míad^N	míad^N	míad^L, míada
Genitive	méid^L	míad	míad^N
Dative	míad^L	míadaib	míadaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

Masculine o-stem
	Singular	Dual	Plural
Nominative	míad	míad^L	méid^L
Vocative	méid	míad^L	míadu^H
Accusative	míad^N	míad^L	míadu^H
Genitive	méid^L	míad	míad^N
Dative	míad^L	míadaib	míadaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

Old Irish mutation
Radical	Lenition	Nasalization
míad also mmíad after a proclitic	míad pronounced with /ṽ(ʲ)-/	unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Pokorny, Julius (1959) “967-68”, in Indogermanisches etymologisches Wörterbuch [Indo-European Etymological Dictionary] (in German), volume 3, Bern, München: Francke Verlag, pages 967-68