速 sù HSK3 quick Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: fast All meanings 3 sù 3 fast 2velocity 1 2 sentences for 速 (sù — fast) 情况紧急,请速回信。 qíngkuàng jǐnjí, qǐng sù huíxìn. The situation is urgent; please reply immediately. Source: Dong Chinese Dictionary欲速则不达。 yù sù zé bù dá. Haste makes waste. Source: Dong Chinese Dictionary