飞快 fēikuài fast Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: sharp All meanings 22 fēikuài 22 fast 21sharp 1 1 sentence for 飞快 (fēikuài — sharp) 这把菜刀磨得飞快。 zhè bǎ càidāo mó de fēikuài. This kitchen knife has been sharpened until it's razor-sharp. Source: Dong Chinese Dictionary