demoralise
de-mor-al-ise
verb
To cause someone to lose confidence or hope; to dishearten them.
"The constant criticism began to demoralise the staff."
Thesaurus
Synonyms: debase, pervert, subvert, misdirect, profane, demoralize, corrupt, debauch, vitiate, deprave, get down, dismay
Antonyms: elate, intoxicate, lift up, pick up, uplift