After the long hike, the children were in a state of complete exhaust.

The state of being drained of energy or resources.
The long journey left them in exhaust.
He felt a deep exhaust after the race.
Her body showed signs of exhaust.
complete exhaust
utter exhaust
total exhaust
fatigue
weariness
debilitation
The long hike will exhaust you.

to use up completely or to drain of resources or energy.
The work will exhaust my patience.
Don't exhaust all your money.
The race exhausted the runners.
exhaust resources
exhaust supplies
exhaust energy
drain
deplete
use up
The kitchen has an exhaust fan to remove cooking fumes.

A device used to remove air or gas from a space.
The exhaust vent needs cleaning.
Turn on the exhaust for the fumes.
This exhaust removes bad air.
kitchen exhaust
car exhaust
exhaust fan
vent
outlet
duct