信物 (xìnwù) is a noun meaning a physical object that serves as a token of trust, a keepsake that authenticates a relationship, promise, or commitment. It often appears in historical or romantic contexts — for example, lovers exchanging a 信物 to seal an engagement, or a commander giving a token to prove an order is genuine. The emphasis is on the object's role as proof or symbol of something intangible, like loyalty or love.