Discourage

[Rihanna]

To extinguish the courage of; to dishearten; to
depress the spirits of; to deprive of confidence; to deject; -- the
opposite of encourage; as, he was discouraged in his undertaking; he
need not be discouraged from a like attempt.

[Dianne]

to tend to [prevent] something from [happening] by making it more difficult or [unpleasant]; to try to stop somebody from doing something

[Merna]

To enforce a student to suffer the [consequences] of being [enrolled] in a calculus-related [course].

[Renato]

Cause (someone) to lose confidence or enthusiasm.