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exhaust

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exhaust
I
exhaust1 /ɪɡˈzɔːst $ -ˈzɒːst/ verb [transitive]
 Date: 1500-1600
 Language: Latin
 Origin: exhaustus, past participle of exhaurire, from haurire 'to draw off liquid, drain'
1. to make someone feel extremely tired:
    A full day’s teaching exhausts me.
    exhaust yourself
    He’d exhausted himself carrying all the boxes upstairs.
2. to use all of something
   SYN  use up:
    We are in danger of exhausting the world’s oil supply.
    Having exhausted all other possibilities, I asked Jan to look after the baby.
3. exhaust a subject/topic etc to talk about something so much that you have nothing more to say about it:
    Once we’d exhausted the subject of Jill’s wedding, I didn’t know what to say.

II
exhaust2 noun

1. (also exhaust pipe) [countable] a pipe on a car or machine that waste gases pass through
2. [uncountable] the gas produced when an engine is working:
    exhaust fumes