A. Insincere
B. Genuine
C. Honest
D. Truthful
Answer: Insincere
A. Insincere
B. Genuine
C. Honest
D. Truthful
Answer: Insincere
Additional Information: 'Insincere' is the antonym of 'sincere', meaning lacking in honesty or integrity.
Subjects: Synonyms and Antonyms, Vocabulary