Synonyms of unprincipled in English:

unprincipled


See definition of unprincipled

adjective

1‘he is an unprincipled opportunist’

SYNONYMS

immoral, unethical, unscrupulous, amoral, dishonourable, reprobate, dishonest, unprofessional, deceitful, devious, corrupt, corrupted, dissolute, underhand, crooked, bad, wicked, evil, villainous, roguish, shameless, sinful, ignoble, base, low, degenerate, sordid

archaic dastardly

ANTONYMS

principled, ethical