answer/ 'ɒːnsər /

1.noun [c] 
(reply) (to question) 回答

2.noun
(to letter) 回信

3.noun
(solution) (to problem,in exam or quiz) 答案

4.vi.
(reply) (to question) 回答

5.vi.
(to telephone ringing,knock at door) 应答

6.vt.[+person] 
(reply to) 答复

7.vt.[+question] 
(asked by person,in exam or quiz) 回答

8.vt.[+letter] 
回复

9.vt.[+advertisement] [ prayers] 
回应

She answered an advert for a job as a cook.
她应聘了厨师的招聘广告。
10.vt.[+need] 
(satisfy) 满足

11.vt.
see answer to

there was no answer
无人接听
12.vt.
(at door) 无人应答

in answer to...
回应…
to answer the phone
接听电话
to answer the door
应声开门