Read the dictionary definition of drain. All definitions for this word.
1. emptying something accomplished by allowing liquid to run out of it
2. a gradual depletion of energy or resources
1. a drain on resources
2. a drain of young talent by emigration
3. a pipe through which liquid is carried away
4. tube inserted into a body cavity (as during surgery) to remove unwanted material
5. make weak
1. Life in the camp drained him
6. empty of liquid; drain the liquid from
1. We drained the oil tank
7. deplete of resources
1. The exercise class drains me of energy
8. flow off gradually
1. The rain water drains into this big vat