The word 打仗 is formed by combining the character 打, which means "to hit" or "to strike", with the character 仗, which means "a weapon" or "a war". Together, they create a vivid conceptual image of "striking with weapons", which directly and pictorially conveys the core action and instrument of warfare, evolving to mean "to wage war" or "to fight a battle". It’s a logical and intuitive pairing where the action meets the tool/context, forming a compound that is greater than the sum of its parts.