The word 废物 is formed through a direct and logical combination of its two component characters: 废 (fèi), meaning "to waste", "useless", or "disabled", and 物 (wù), meaning "thing" or "object". By placing the descriptive state of "uselessness" before the general category of "thing", the compound naturally creates the meaning of a "useless thing" or "waste". It is a conceptual assembly where the first character defines the quality or condition of the second, resulting in a new, unified concept understood as "trash" or "good-for-nothing".