The Chinese word "大衣" is formed through the direct combination of two characters: "大", which means "big" or "large", and "衣", which means "clothing" or "garment". Together, they create a compound word that literally translates to "big clothing", conceptually referring to a coat or overcoat. This formation simply denotes a garment that is larger and typically worn over other clothes, with the first character descriptively modifying the second to specify a particular type of attire.