vt.

1. 使迷惑；使为难，使窘困[H]
   What puzzles me is why they didn't show up.

   令我百思不解的是他们为什么没有出现。

   He looked a little puzzled.

   他看上去有点困惑。

   His recent behavior puzzles me.

   他最近的行为使我迷惑不解。

2. 苦思而得出[（+out）]
   I could not puzzle out her intentions.

   我猜不出她的意图。

   We finally puzzled out the meaning of the poem.

   我们苦苦思索终于理解这首诗的意思。

vi.

1. 感到迷惑[（+at）]
   I have been puzzling about this question for weeks now.

   我对这个问题已冥思苦想了好几个星期。

2. 苦思，冥思苦想[（+about/over/as to）]

n.

1. （游戏的）猜谜，智力竞赛[C]
2. 难题，谜，难以理解之事[S1]
   Her decision was a puzzle to him.

   她的决定对他来说是个谜。

3. 困惑，迷惑[S]
   I'm in a puzzle as to how to cope with the new situation.

   我不知道该如何应付这新局面。

v.

1. confuse (someone) on account of being difficult to understand.
2. think hard about something difficult to understand.

n.

1. a game, toy, or problem designed to test ingenuity or knowledge.
2. a puzzling person or thing.