快 kuài rapidquickspeedratesoonalmostto make hastecleversharp (of knives or wits)forthrightplainspokengratifiedpleasedpleasant Example sentences 他走得很快。 tā zǒu de hěn kuài. He walks fast 我写汉字，写得不快。 wǒ xiě hànzì, xiě de bù kuài. I write Chinese words at a slow speed