drain

Flow off gradually.

“The rain water drains into this big vat”

Make weak.

“Life in the camp drained him”

Deplete of resources.

“The exercise class drains me of energy”

Empty of liquid; drain the liquid from.

“We drained the oil tank”

A pipe through which liquid is carried away.

Emptying something accomplished by allowing liquid to run out of it.

A gradual depletion of energy or resources.

“a drain on resources”

“a drain of young talent by emigration”

Tube inserted into a body cavity (as during surgery) to remove unwanted material.