Synonyms of illegitimate in English:

illegitimate


See definition of illegitimate

adjective

1‘illegitimate share trading’

SYNONYMS
illegal, unlawful, illicit, against the law, criminal, lawbreaking, actionable, felonious
unlicensed, unauthorized, unsanctioned, unwarranted, unofficial
banned, forbidden, barred, prohibited, outlawed, interdicted, proscribed, not allowed, not permitted, against the rules
contraband, black-market, under the counter, bootleg
fraudulent, corrupt, dishonest, dishonourable
verboten
malfeasant
informal crooked, shady
British informal bent, dodgy
ANTONYMS

legitimate, lawful

2‘an illegitimate child’

SYNONYMS
born out of wedlock, born of unmarried parents
love
dated born on the wrong side of the blanket, unfathered
archaic bastard, natural, misbegotten, baseborn, spurious, nameless
rare adulterine
ANTONYMS

legitimate

3‘it is quite illegitimate to treat such a person as a swindler’

SYNONYMS
incorrect, illogical, invalid, unsound, spurious, wrongly inferred, wrongly deduced
ANTONYMS

legitimate, correct