unteach

That Elder Berries are poison, as we are taught by tradition, experience will unteach us.

As experience in the past has not taught it, experience in the future cannot unteach it.

The rebel himself has taught a lesson to the world, which he can never unteach.

I don't dare teach him mine, much less unteach him his mother's.

It was you who taught me to disdain adulation: will you unteach your pupil?'