What are the idioms to describe sharp knives?

1,edgy? [fēng máng bérn]

Sharp edge: The cutting edge and tip of a sword and other weapons are sharp. The metaphor is sharp and makes people feel stressed.

Step 2 cut the iron silently

Describe a sword.

3. It is new in Xi.

New hair: just ground; Yao: A whetstone. This knife has just sharpened on the grindstone. Describe very sharp or budding.

4. blow-dry and sharpen your hair? [chumáo lìrèn]

Spread the hair and hair on a knife or blade, blow hard and cut off the hair. Describe the sword as extremely sharp.

5. Cut iron like mud

Cutting iron is like cutting earth. Describe the murder weapon as extremely sharp.

Make sentences:

[sharp-edged] [fēng máng bérén] Fortunately, in recent years, from Guixi to Jiangxi, from sharp-edged to smooth sailing, from the road of enlightenment to the rebellion of Wang Ning, the psychological quality is still excellent, and I have long been used to life and death and despised fame and fortune.

[edgy] [fē ng má ng bī n] Su Youqing didn't expect Li Xing to do it right away. After the reaction, the sharp-edged firm but gentle has taken the lead in killing.

[edgy] [fē ng má ng b? n] I don't know what magic ChanZhongyuan used, but now he actually went around to Shao Yuntang and stabbed him with his sword, bringing out a sharp shock wave and stabbing him in the chest.

[edgy][fēng máng bérén] Luo didn't care too much. His face is not particularly outstanding. He is not as beautiful as the so-called handsome guy, and can fascinate women.

[Sharp blade] 【 fēng máng bérén 】 Lv Liangyu walked to the big stone, only to see the simple body with scales on it, and the hilt was as sharp as a faucet.