What does 快 (kuài) mean in English?
快
rapid; quick; speed; rate; soon; almost; to make haste; clever; sharp (of knives or wits); forthright; plain-spoken; gratified; pleased; pleasant
rapid; quick; speed; rate; soon; almost; to make haste; clever; sharp (of knives or wits); forthright; plain-spoken; gratified; pleased; pleasant