muddy

get muddy, dirty / become hoarse, dull (of a sound) / become dull (of a color) / become impure / (phonetics) be voiced

Kyūjitai form of 濁点: voicing mark: the mark added to か (ka) to produce が (ga).

semi-voiced mark; mark that changes Japanese h/f into p: は (ha) > ぱ (pa)