Un‐teach″ (?), v. t. [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. Sir T. Browne.
One breast laid open were a school
Which would unteach mankind the lust to shine or rule. Byron.
2. To cause to be forgotten; as, to unteach what has been learned. Dryden.