exhaust

/ɪɡˈzɔːst/

noun

1
A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system.
2
The steam let out of a cylinder after it has done its work there.
3
The dirty air let out of a room through a register or pipe provided for the purpose.
4
An exhaust pipe, especially on a motor vehicle.
5
Exhaust gas.

1
To draw or let out wholly; to drain off completely
“Moisture of the earth is exhausted by evaporation.”
2
To empty by drawing or letting out the contents
“to exhaust a treasury”
3
To drain; to use up or expend wholly, or until the supply comes to an end
“I exhausted my strength walking up the hill.”
4
To tire out; to wear out; to cause to be without any energy
“The marathon exhausted me.”
5
To bring out or develop completely
6
To discuss thoroughly or completely
“That subject has already been fully exhausted.”
7
To subject to the action of various solvents in order to remove all soluble substances or extractives
“to exhaust a drug successively with water, alcohol, and ether”