Synonyms of insincere in English:

insincere


See definition of insincere

adjective

1‘an insincere smile’

SYNONYMS
false, fake, hollow, artificial, feigned, pretended, put-on, exaggerated, overdone, lacking sincerity, not candid, not frank
disingenuous, dissembling, dissimulating, devious, hypocritical, cynical, deceitful, deceptive, duplicitous, dishonest, underhand, double-dealing, faithless, disloyal, treacherous, two-faced, Janus-faced, lying, untruthful, mendacious, evasive, shifty, slippery
informal phoney, fakey, pretend, pseud
ANTONYMS

sincere