| The monotonous words sounded fake and insincere, as if they were predetermined and he was only reciting the memorized lines in some sort of play. |
| The crowd's loud cheers and shouts of applause were typical of the flatterer, excessive and insincere. |
| While having a positive and happy disposition, you are so sensitive that you can feel when others are being dishonest or insincere. |
| However, because he still possesses his crown, his queen, and his ambition, the guilt-ridden murderer knows that his repentance is insincere. |
| When hunting was banned, there was much insincere, scientifically discredited waffle about cruelty to animals. |
| The till staff had learnt the script for their cheery greeting well, without ever sounding transatlantically insincere. |
