godan verb (-su), transitive verb
twist; twirl; fiddle with (physically)
Physical sense: twisting, twirling, or fiddling with an object in one's hands, often idly or repeatedly.
彼はペンをひねくり回しながら考えていた。
He was thinking while twirling a pen in his fingers.
godan verb (-su), transitive verb
tinker with; rewrite; play around with (words/ideas)
Abstract sense: tinkering with words, plans, or ideas, often by rewriting or reworking them repeatedly.
彼は原稿を何度もひねくり回して、ようやく完成させた。
He tinkered with the manuscript many times and finally completed it.
godan verb (-su), transitive verb
rack one's brains; worry over
Figurative use: racking one's brains or worrying over a problem, often with a sense of overthinking.
難しい問題をひねくり回しても、答えは出なかった。
Even after racking my brains over the difficult problem, I couldn't find an answer.