Old English betæcan "give up to, impart, deliver; appoint, set apart, dedicate," from be- + teach (v.). Form and sense confused with betake. Meaning "impart, teach" is from c. 1300; the word was obsolete or archaic from 16c. Related: Betaught; beteaching.
beta
betake
Betamax
betcha
bete noire
beteach
betel
Betelgeuse
Bethany
bethel
Bethesda
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