An example of to dishearten is to tell a person that he will never fulfill his dreams.
transitive verbdis·heart·ened, dis·heart·en·ing, dis·heart·ens
(third-person singular simple present disheartens, present participle disheartening, simple past and past participle disheartened)
dis- + hearten
- The friendly attitude of France towards Italy during the period immediately subsequent to the occupation of Rome seemed to cow and to dishearten the Vatican.