Middle English word forbowen comes from Old English for-, Old English būgan

Detailed word origin of forbowen

Dictionary entry	Language	Definition
for-	Old English (ang)	Forming verbs from verbs with various senses especially ‘wrongly, away from, astray, abstention, prohibition, perversion, destruction’. Used to create intensified adjectives and verbs from other adjectives and verbs, with the sense of completely or fully. Compare Modern English use of up. Very.
būgan	Old English (ang)
forbugan	Old English (ang)	To avoid, abstain. To be absent. To evade, shirk, neglect, disobey. To pass over, shun.
forbowen	Middle English (enm)

Words with the same origin as forbowen