English
forteach
From for- + teach.
Proto-Indo-European *pro- ‘before, in front of’
Proto-Germanic *fra- ‘off, away’
Proto-West Germanic *fra- ‘forms verbs with the sense of "away from" or…’
English for-
Proto-Indo-European *deyḱ- ‘to show’
Proto-Germanic *taikijaną ‘to show’
Proto-West Germanic *taikijan
Old English tǣċan ‘to show’
Middle English techen ‘to teach’
English teach
Today it means
verb To unteach; contradict; misteach.
Language periods are conventional ranges, not dates for this word.
Etymograph / forteach