demerit

nouns

a mark against a person for misconduct or failure; usually given in school or armed forces
"ten demerits and he loses his privileges"
is a type of (narrower)
a symbol of disgrace or infamy
"And the Lord set a mark upon Cain"--Genesis
the quality of being inadequate or falling short of perfection
"they discussed the merits and demerits of her novel"; "he knew his own faults much better than she did"
antonym