beteach

The story

1. Old English · inherited frombetǣċan“to make over, give up to impart, deliver, entrust, commend to, betroth, appoint (for), set apart as, dedicate, show, point out, give orders, pursue, hunt”
2. Middle English · inherited frombetechen
3. English todaybeteach

From Middle English betechen, from Old English betǣċan (“to make over, give up to impart, deliver, entrust, commend to, betroth, appoint (for), set apart as, dedicate, show, point out, give orders, pursue, hunt”), corresponding to be- + teach.