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to twist; to contort
「捩る」 has other readings with different meanings.
体を上手に捩って狭い隙間を何とか通り抜けた。
I twisted my body through the narrow gap.
彼は痛みに耐えきれず体を捩った。
He twisted his body, unable to bear the pain.
彼女は濡れたタオルを両手で捩っている。
She is wringing a wet towel with both hands.