depreciate
de-pre-ci-ate
verb
To belittle or disparage someone or something; to undervalue.
"Don't depreciate his efforts; he tried hard."
verb
To lessen in value or price over a period of time.
"New cars depreciate rapidly after purchase."
Thesaurus
Synonyms: vilipend, deprecate, devalue, devaluate, undervalue
Antonyms: appreciate, apprise, apprize, revalue