Chéng yì literally combines 诚 (chéng), meaning 'sincere' or 'honest', and 意 (yì), meaning 'intention' or 'mind'. Together, they express a deep, genuine attitude—especially in interpersonal interactions—where one’s words and actions align with inner conviction. It conveys moral integrity and heartfelt goodwill, not just surface-level politeness.

This word is commonly used in formal, respectful, or morally charged contexts: business negotiations, apologies, marriage proposals, or expressions of gratitude. It often appears in set phrases like 诚意道歉 (a sincere apology) or 带着诚意而来 (coming with sincerity). Unlike casual synonyms like 真心 (zhēn xīn), 诚意 carries a stronger sense of responsibility and social weight—it implies willingness to act on one’s sincerity, not just feel it.