1. She gave him an insincere smile, knowing she didn't truly mean it.
2. His insincere apology didn't convince anyone that he was truly sorry.
3. I could tell from her insincere tone that she wasn't being honest with me.
4. His insincere flattery made me feel uncomfortable and suspicious of his intentions.
5. I could see through his insincere compliments and knew he was just trying to manipulate me.
6. The politician's insincere promises did little to gain the trust of the public.
7. She was known for her insincere gestures, always putting on a show for others.
8. His insincere offer to help felt more like a burden than genuine assistance.
9. The insincere condolences from her coworkers did little to comfort her in her time of grief.
10. I could sense the insincere nature of his words, making it difficult to trust anything he said.