Demoralize

Webster's Dictionary of the English Language

·vt To corrupt or undermine in morals; to destroy or lessen the effect of moral principles on; to render corrupt or untrustworthy in morals, in discipline, in courage, spirit, ·etc.; to weaken in spirit or efficiency.

Related Words

to demoralize
To corrupt and undermine the morals of; to destroy or lessen the effect of moral principles on.--Web...

Dictionary of American Words And Phrases by John Russell Bartlett.