vt.

1. 紮牢；繫緊；閂住；釘牢[（+up/together）]
   The little boy has learnt to fasten shoelaces.

   這小男孩已學會繫鞋帶了。

2. 把（目光，注意等）集中於[（+on/upon）]
   The old lady fastened her eyes on the stranger.

   老太太始終注視著那個陌生人。

3. 把（綽號，罪名等）強加於[（+on/upon）]
   It was wrong of you to fasten the blame on him.

   你把過錯推到他頭上是不對的。

vi.

1. 扣緊；閂住
   The door won't fasten.

   門閂不上。

2. 集中注意力，全神貫注[（+on/upon）]
   Fasten on what the teacher is saying.

   注意聽老師說。

3. 抓住；盯住不放地攻擊[（+on/onto/upon）]
   There is no sense in fastening on that pretext of yours.

   一味強調你那個藉口是沒有用處的。

v.

1. close or do up securely.
   ▸fix or hold in place.
   ▸ (fasten something off) secure the end of a thread with stitches or a knot.
2. (fasten on/upon) single out (something) and concentrate firmly on it.