warn in advance or beforehand; give an early warning; "I forewarned him of the trouble that would arise if he showed up at his ex-wife's house" 前もって、あらかじめ警告する。早期警告をする。
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【上位】 notify of danger, potential harm, or risk; "The director warned him that he might be fired"; "The doctor warned me about the dangers of smoking" 危険、潜在的害または危険を通知する。
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