Unteach
Unteach , transitive verb
[1st pref. un- + teach.]
1.
To cause to forget, or to lose from memory, or to disbelieve what has been taught.
Experience will unteach us.
One breast laid open were a school
Which would unteach mankind the lust to shine or rule.
2.
To cause to be forgotten; as, to unteach what has been learned. — Dryden