The word 拘捕 is formed by combining two characters, each contributing a distinct action to create the unified concept of "arrest". The first character, 拘, carries the meaning of to restrain, detain, or confine. The second character, 捕, means to catch, seize, or capture. When placed together, they sequentially depict the full process of an arrest: first the seizing or apprehending of a person (捕), followed immediately by the act of taking them into custody or restraint (拘). Thus, the formation is a logical, action-oriented compound where the two steps merge to represent the single, complete procedure.