WEBMar 29, 2024 · Synonym: 鈍 / 钝 (dùn) 把 刀 磨 快 ― bǎ dāo mó kuài ― to sharpen the knife. 快 刀斬亂麻 /快 刀斩乱麻 ― kuàidāozhǎnluànmá ― to cut the Gordian knot (literally, “to cut the messy ropes with a sharp knife”) keen; quick-witted. 反應 快/ 反应 快 ― fǎnyìng kuài ― quick in response. 腦子 快 ...