威力 literally combines 威 (wēi, 'might' or 'awe-inspiring authority') and 力 (lì, 'strength' or 'force'), forming a noun meaning 'power', 'force', or 'effectiveness'—especially power that is impressive, intimidating, or highly effective. It often describes the tangible impact of something physical (e.g., a weapon, natural phenomenon, or animal’s attack) or abstract (e.g., a law, policy, or persuasive argument).

The word carries a slightly formal or literary tone and is commonly used in contexts where strength produces visible, often dramatic results—such as the destructive force of a typhoon, the deterrent effect of military hardware, or the commanding presence of a large predator. Unlike general terms like 力量 (lìliàng, 'strength') or 能力 (nénglì, 'ability'), 威力 emphasizes observable, consequential force—not potential or capacity, but actual, impactful power.