shi1
louse

strokes 15
radical
strokes after radical 9
木虱 木蝨 mu4 shi1
woodlouse

虱多不痒 蝨多不癢 shi1 duo1 bu4 yang3
many fleas, but unconcerned (idiom); no point in worrying about one debt when one has so many others; Troubles never come singly.; It never rains but it pours.

虱子 蝨子 shi1 zi5
louse (Pediculus humanus)

头虱 頭蝨 tou2 shi1
head lice