draw down
phrasal verbdraw something  down | draw down 
- (especially North American English) to reduce a supply of something that has been created over a period of time; to be reduced- There are many life events that can unexpectedly draw down savings.
- If we don't cut costs our reserves will draw down.
- Our state reservoirs were drawn down this summer.
 
draw something  down (from something) | draw down on something  (especially North American English)
- (finance) to take money from a fund that a bank, etc. has made available- The company has already drawn down €600 million of its €725 million credit line.
- They can draw down on the loan at any time.