The word "打断" is formed through a vivid, sequential combination of two concrete actions: 打 (dǎ), meaning "to hit" or "to strike", is followed by 断 (duàn), meaning "to break" or "to sever". The formation visualizes a process where the first action directly causes the result of the second, creating a unified concept of "to hit and break", which extends metaphorically to interrupting someone (as if breaking the flow of speech) or physically breaking an object by force. It is a direct fusion of cause and effect into a single, compact idea.