The word 丢失 is formed by combining two characters, 丢 and 失, which both independently carry the core meaning of "to lose". This construction is a conceptual fusion where the first character, 丢, often implies the active act of misplacing or letting something go, and the second, 失, reinforces the state of loss or absence. Together, they create a single, reinforced concept that emphasizes the complete action and resulting state of something becoming lost, blending the initiating action and the final consequence into one integrated idea.