1. Having a debilitating effect
   "The draining workweek left her exhausted by Friday";
   - exhausting

1. Empty of liquid; drain the liquid from
   "We drained the oil tank"
    
2. Flow off gradually
   "The rain water drains into this big vat";
   - run out
    
3. Deplete of resources
   "The exercise class drains me of energy"
    
4. Make weak
   "Life in the camp drained him";
   - enfeeble, debilitate

See also: debilitating

Type of: consume, course, deplete, eat, eat up, empty, exhaust, expend, feed, flow, run, run through, use, use up, weaken, wipe out

Encyclopedia: Draining