adjective
1.
lacking in moral scruples
unscrupulous conduct of political leaders
Synonyms: conscienceless, stick-at-nothing, unconscionable, unprincipled
Related Word: crafty, deceitful, scheming; improper, unseemly, wrongful; corrupt, crooked, dishonest; questionable, shady, sinister, underhand
Contrasted words: conscientious, dutiful, proper, upright; dependable, reliable, responsible
Antonyms: scrupulous
2.
Synonyms: corrupt 2, mercenary, praetorian, unethical, unprincipled, venal
Contrasted words: meticulous, particular, punctilious, strict
Antonyms: scrupulous