The word "一举一动" is formed by the sequential pairing of two nearly identical structures: "一举" (yī jǔ), where "一" means "one" and "举" means "lift" or "act", followed by "一动" (yī dòng), where "一" again means "one" and "动" means "move" or "action". This combination yields a literal sense of "one action, one movement", which together function as a fixed idiom denoting every single action or all behaviors.