Insincere/ˌɪnsɪnˈsɪr/ Definition 1 of 2Pro Tip 1/3Emotional Disconnect Shows lack of real emotion behind words. Despite his cheers, his insincere tone revealed his disinterest. Pro Tip 2/3Hidden Motives May imply a hidden agenda or dishonest intentions. Her insincere flattery was a ploy to win the competition. Pro Tip 3/3Cultural Perception Perceived differently across cultures; be mindful of this. His insincere farewell was polite in his culture but rude in mine.