敢不 (gǎn bù) — how could one dare not ...?

敢不

gǎn bù

how could one dare not ...?how could I possibly fail to ...?

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敢

bold, brave; to dare, to venture

radical 攵components ⿰⿱？耳攵

不

no, not, un-; negative prefix

radical 一components ⿱一？