The word 打击 is formed by combining two characters with closely related meanings to create a more comprehensive and intensified concept. The first character, 打 (dǎ), fundamentally means "to hit" or "to strike", conveying a direct, physical action. It is paired with 击 (jī), which also means "to hit", "to strike", or "to attack", but often carries a sense of a targeted or forceful blow. Their combination is not merely redundant but synergistic, merging their similar semantic fields to solidify and abstract the core idea of an impactful strike, which then extends naturally from the physical realm (like striking an object) to metaphorical ones (like striking a blow to someone's morale or attacking a problem).