WordNet
frailty
名詞
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弱さ 虚弱 病弱
the state of being weak in health or body (especially from old age).
健康面や身体面で弱い状態(特に年を取ってからの)。
言い換え: debility feebleness infirmity valetudinarianism frailness
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心の弱さ
moral weakness.
道徳的な弱さ。
言い換え: vice