Middle English word attournen comes from Old French torner, Old French a-, and later Old French aturner ((Anglo-Norman).)

Detailed word origin of attournen

Dictionary entry	Language	Definition
torner	Old French (fro)	(transitive, or, intransitive) to turn. To return; to go back.
a-	Old French (fro)	(by extension) indicating a change of state. Indicating movement towards something. Intensifying prefix.
aturner	Old French (fro)	(Anglo-Norman).
attournen	Middle English (enm)

Words with the same origin as attournen