メイ, な.く, な.る, な.らす, なり, なる
chirp, cry, bark, sound, ring, echo, honk
JLPT3 G2 S14 F1279
口 mouth here an abbreviated form# of 名 (reveal oneself) + 鳥 bird → bird that, by its cries, reveals itself → *cry/sound* (produced by an animal) → *sound/ring out*; *play* (an instrument); *resound*.
[Full Kanji Etymology List]