名詞 knack:

1. a special way of doing something
   同義詞：bent, hang

1. He has an unerring knack of saying the wrong thing.
   他有個出言必失的本領。
2. I used to be able to skate quite well, but I've lost the knack.
   我從前滑水滑得很不錯，可現在沒有這本事了。
3. There's a knack in/to locking this door which takes a while to master.
   鎖這門要有竅門，得用些時間才能學會。
4. My car has a knack of breaking down just when I need it most.
   我的汽車總是在我最需要的時候拋錨。
5. Making an omelette is easy once you've got the knack (of it).
   一旦你掌握了煎蛋餅的技巧，做起來就很容易了。

knack

n.（名詞）
A clever, expedient way of doing something.
訣竅：做事情的靈巧的，便利的方法
A specific talent for something, especially one difficult to explain or teach.See Synonyms at art
技能：對某事，尤其是難以解釋或教導的事的特殊才能參見 art
Archaic
【古語】
A cleverly designed device.
精巧設計的裝置
A knickknack.
小玩意兒

來源：
Middle English knakke
中古英語 knakke
from Middle Dutch cnacken [to strike, crack]
源自 中古荷蘭語 cnacken [撞擊，裂開]
[probably of imitative origin]
[可能是起源于擬聲詞]