contorcersi bedeutet auf Englisch

wriggle [wriggled, wriggling, wriggles]▼(to twist one's body and move the limbs)
verb
[UK: ˈrɪɡ.l̩] [US: ˈrɪɡ.l̩]

writhe [writhed, writhing, writhes]▼(to twist or contort the body)
verb
[UK: ˈraɪð] [US: ˈraɪð]