líaig

Old Irish

From Proto-Celtic *leigis, generally connected with Proto-Germanic *lēkijaz (“doctor, physician”).^[1] See there for more.

líaig m

Masculine i-stem
	Singular	Dual	Plural
Nominative	líaig	líaig^L	legi^H
Vocative	líaig	líaig^L	legi^H
Accusative	líaig^N	líaig^L	legi^H
Genitive	lego^H, lega^H	lego^H, lega^H	lege^N
Dative	líaig^L	legib	legib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

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

^ Guus Kroonen (2013) “*lēkja-”, in Alexander Lubotsky, editor, Etymological Dictionary of Proto-Germanic (Leiden Indo-European Etymological Dictionary Series; 11)‎^[1], Leiden, Boston: Brill, →ISBN, page 331