exhausting

To draw or let out wholly; to drain off completely

“Moisture of the earth is exhausted by evaporation.”

To empty by drawing or letting out the contents

“to exhaust a treasury”

To drain; to use up or expend wholly, or until the supply comes to an end

“I exhausted my strength walking up the hill.”

To tire out; to wear out; to cause to be without any energy

“The marathon exhausted me.”

To bring out or develop completely

To discuss thoroughly or completely

“That subject has already been fully exhausted.”

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”

Very tiring.

“This task is exhausting!”