The word 反击 is formed by combining two independent characters, each contributing a core action to create a new, unified concept. The first character, 反, carries the meaning of "to turn over", "opposite", or "to oppose", establishing the idea of a contrary or returning motion. The second character, 击, means "to hit", "to strike", or "to attack". Their combination does not simply list two actions; instead, it forges a logical and sequential cause-and-effect relationship, where the act of turning against or opposing (反) directly channels into and is realized through the act of striking back (击), thus conceptually merging into the single, integrated notion of a "counterattack".