Webster's English Dictionarywrithe
writhe \'ri-th\ vb [ME writhen, fr. OE wri-than; akin to ON ri-tha to twis]t, OE wrigian to turn - more at WRY 1a: to twist into coils or folds 1b: to twist so as to distort : WRENCH 1c: to twist (the body or a bodily part) in pain 2: INTERTWINE 1: to move or proceed with twists and turns 2: to become twisted in or as if in pain or struggling 3: to suffer keenly from torment - writhe n