drain/ dreɪn /

1.noun [c] 
(in street) 排水沟

2.noun [+resources] [ funds] 
to be a drain on sth 某物的大量的消耗

3.vt.[+land] [ marsh] [ pond] 
排去…的水

4.vt.[+vegetables] 
使…流干

5.vt.[+liquid] 
排掉

6.vt.[+glass] [ cup] 
喝干

7.vt.[+person] 
(exhaust) 使…精疲力竭

8.vi.[liquid+] 
流入

to feel drained (of energy {or} emotion)
感到(精力{或}感情)耗尽
(to go) down the drain
 [inf] 白费
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