adj. 25B6; adjective UNPRINCIPLED, unethical, immoral, conscienceless, shameless, reprobate, exploitative, corrupt, dishonest, dishonourable, deceitful, devious, underhand, unsavoury, disreputable, evil, wicked, villainous; informal crooked, shady; dated dastardly.
UNSCRUPULOUS
Meaning of UNSCRUPULOUS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012