The word 躯体 is formed as a compound of two synonymous characters, both meaning "body", to create a more formal and literary term. The first character, 躯 (qū), specifically refers to the human torso or physical frame, while the second, 体 (tǐ), is a more general term for body, form, or substance. Their combination follows a common Chinese morphological pattern where two similar-meaning characters are paired, resulting in a tautological compound that reinforces and elevates the core concept. Thus, 躯体 collectively denotes the physical body, often with a connotation of the material or corporeal form, and is typically used in written or formal contexts rather than everyday speech.