目覚し

めざまし · mezamashi · JLPT N2 · noun

alarm-clock

⏰ 目 (eye) + 覚まし (wake up): the device that wakes your eyes up

覚ます means to wake someone, so 目覚まし is literally eye-waking. Standard spelling is 目覚まし; 目覚し is a variant.

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