the world > movement > motion in specific manner > writhing or twisting movement > writhe or twist [verb (reflexive)] (4)
reflexive. = 7a 2b archaic.
To twist, writhe, or wrest (a person or thing); to force (a limb, etc.) round or about so as to cause a sprain or pain.
transitive. To contort or twist (the body, limbs, etc.). Also reflexive: to contort or twist (oneself). Also with adverb.