何以 héyǐ why Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: how All meanings 3 héyǐ 3 why 2how 1 1 sentence for 何以 (héyǐ — how) 你何以证明这张钞票不是伪造的? nǐ héyǐ zhèngmíng zhè zhāng chāopiào bù shì wěizào de? How can you prove this banknote is not a counterfeit? Source: Dong Chinese Dictionary