‘诚恳’ is an adjective meaning 'sincere' or 'earnest', describing speech, behavior, or attitude that is genuine, heartfelt, and free of pretense. The first character, 诚 (chéng), means 'honesty' or 'sincerity'; the second, 恳 (kěn), conveys 'earnestness', 'seriousness', or 'deep sincerity'. Together, they emphasize both moral integrity and emotional authenticity — not just telling the truth, but doing so with warmth and humility. It’s commonly used to describe apologies, feedback, invitations, or expressions of gratitude.

This word carries a respectful, slightly formal tone and appears frequently in interpersonal communication, especially when someone wants to convey trustworthiness or vulnerability. Unlike casual synonyms like 真实 (zhēnshí, 'true'), 诚恳 focuses on the speaker’s intention and emotional openness rather than factual accuracy. It often modifies nouns like 态度 (attitude), 道歉 (apology), or 建议 (suggestion), or functions as a predicate adjective after 是 or 很.