na-adjective, noun
mean; contemptible; despicable; cowardly
Describes behavior or character that is base, underhanded, or lacking moral courage; often used to condemn unfair or sneaky actions.
彼の卑劣な手口には本当に腹が立つ。
His underhanded tactics really make me angry.
そんな卑劣なことをするなんて、人間として最低だ。
Doing something so despicable is the lowest thing a person can do.