Meaning of “deplete” - Learner’s Dictionary

deplete

verb [ T ] us uk /dɪˈpliːt/

to reduce the amount of something, especially a natural supply:

Alcohol depletes the body of B vitamins.
depletion noun [ U ] us uk /dɪˈpliːʃən/

the depletion of the ozone layer

(Definition of “deplete” from the Cambridge Learner’s Dictionary © Cambridge University Press)