The Chinese word **羁押** (jīyā) is a compound term formed by combining two characters with semantically related meanings to create a specific legal concept. The first character, **羁** (jī), originally meaning a horse’s halter or bridle, carries the extended metaphorical sense of "to restrain," "to detain," or "to tie down." The second character, **押** (yā), means "to escort," "to take into custody," or "to detain" in a more direct, physical sense. When combined, these characters reinforce and specify each other, creating a formal legal term that refers specifically to the act of **custodial detention** or **remand**, typically authorized by judicial authorities, where a suspect is deprived of liberty pending trial or investigation.