Middle English word thrawen comes from Proto-Indo-European *terh₁-, and later Proto-Germanic *þrēaną (To twist, to turn.)

Detailed word origin of thrawen

Dictionary entry	Language	Definition
*terh₁-	Proto-Indo-European (ine-pro)
*þrēaną	Proto-Germanic (gem-pro)	To twist, to turn.
þrāwan	Old English (ang)
þrawan	Old English (ang)	To twist, turn, writhe.
throwen	Middle English (enm)

Words with the same origin as thrawen