苛む[sainamu] to torment
苛めっ子[ijimekko] bully
苛める[ijimeru] to tease
苛虐[kagyaku] cruel treatment
苛性[kasei] caustic

苛性ソーダ[kaseisooda] caustic soda
苛政[kasei] tyranny
苛税[kazei] heavy taxation
苛立つ[iradatsu] to be irritated
苛立てる[iradateru] to irritate

弄りまわす[ijirimawasu] to tinker with
玩弄[ganrou] make sport of
玩弄物[ganroubutsu] plaything
愚弄[gurou] mockery
飜弄[honrou] trifling with

弄する[rousuru] to play with
弄り[ijiri] meddling
弄る[ijiru] to touch
嘲弄[chourou] scorn
弄ぶ[moteasobu] to play with (a toy, one's hair, etc.)

挵蝶[seserichou] skipper butterfly
挵る[seseru] to perform a small motion repetitively (i.e. picking or poking something)

挵り箸[seseribashi] poking one's food around using one's chopsticks
青翅挵[aobaseseri] blue-winged skipper butterfly