Middle English word anhealden comes from Old English healdan, Old English on-, and later Old English anhealdan (To hold, keep.)

Detailed word origin of anhealden

Dictionary entry	Language	Definition
healdan	Old English (ang)	(intransitive) to maintain one’s position against an enemy. To contain. To hold fast, to grasp. To keep watch over (cattle etc.). To possess.
on-	Old English (ang)	Denoting reverse action. Off, away (inchoactive) in, into; prefix used to intensify an action or to denote origin or initiation. Forming verbs and adjectives from participles and nouns, with various senses of on, upon, to, there, thither.
anhealdan	Old English (ang)	To hold, keep.
anhealden	Middle English (enm)

Words with the same origin as anhealden