godan verb (-su), transitive verb
crush to death with fingers; kill with ease; snuff out
Literally crushing a small creature like an insect between the fingers; figuratively, defeating or destroying something effortlessly.
蚊をひねり殺した。
I crushed the mosquito to death with my fingers.
彼は相手をまるで虫でもひねり殺すかのように倒した。
He defeated his opponent as easily as crushing an insect.