dishonorable
Definitions
Bringing or deserving shame, disgrace, or ignominy.
Lacking integrity or moral character; base or shameful.
Examples
It was considered dishonorable for a knight to abandon his post during the heat of battle.
He felt that accepting the bribe would be a dishonorable act that would ruin his reputation.
Synonyms
shameful disgraceful ignoble unscrupulous corrupt contemptible base
Antonyms
honorable noble reputable virtuous respectable principled admirable