The word "打响" is formed by combining the character "打" (dǎ), which means to hit or strike, with "响" (xiǎng), which means to sound or resonate. This creates a verb-object compound where the action of striking leads to producing a sound, literally meaning "to strike and sound". Figuratively, it conveys the idea of initiating something with noticeable effect, such as starting a battle or event, derived from the causal relationship between the two characters' meanings.