drain
US /dren/
・UK /dreɪn/
B1
noun
- Hole or pipe that water, waste etc. flows into
verb
- To empty or remove liquid from
- To use up the energy/ money/power of something
- (To cause) to become less or smaller; reduce
- To make someone feel tired or weak
Examples
His voice was utterly drained of emotion.
scientists joining the brain drain