in·cur·ably /-blɪ/ 副詞
In·cur·a·bly, adv. In a manner that renders cure impracticable or impossible; irremediably. “Incurably diseased.” --Bp. Hall. “Incurably wicked.”
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incurably
adv 1: to an incurable degree; "she was incurably optimistic"
2: in a manner impossible to cure; "he is incurably ill"