drain noun

1 pipe/hole that dirty water goes down

ADJ. blocked

VERB + DRAIN block | clear, unblock | lay They were busy laying the drains for the new houses.

2 sth that uses up time/money/resources

ADJ. heavy, major, serious | brain scientists joining the brain drain (= moving to a country where they can work in better conditions and earn more)

PREP. ~ on These losses have been a major drain on the company's resources.