ADV
heavily, seriously, severely
The company's cash reserves were heavily depleted after the expensive acquisition last year.
verb
To reduce the amount of; to remove (a substance from something)
The winter storm quickly depleted the salt supply of the county.
Their numbers have been very heavily depleted in the last few years, and soon a most familiar part of the southern railway scene will have vanished: […].
To reduce the amount of; to remove (a substance from something):
To reduce the amount of; to remove (a substance from something):
Certain medications can deplete vitamin D.
To reduce the amount of; to remove (a substance from something):
Its reserves have been invaded and depleted.
Constant vigilance for social threats and the negative emotions it produces (e.g., anxiety) deplete self-regulatory resources.
To reduce the amount of; to remove (a substance from something):
The winter storm quickly depleted the salt supply of the county.
WiktionaryTheir numbers have been very heavily depleted in the last few years, and soon a most familiar part of the southern railway scene will have vanished: […].
Wiktionary... depleting the minerals and fuels of the more developed states, leading to a scarcity of these crucial resources.
Wiktionaryi Register
In some senses, deplete is marked as rare. Watch for register when choosing this word.