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