strike fear into (one's) heart

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strike fear into (one's) heart

To frighten, terrify, or horrify someone. Can also be phrased "strike fear into the heart of (someone)." While rather impractical and ineffective in combat, the use of flamethrowers in World War II was very effective at striking fear into the hearts of civilians and enemy soldiers alike. The recent epidemic has struck fear into people's hearts around the world.
See also: fear, heart, strike