[ ɪg'zɔ:st , ɛg- ]
■ verb
1》 [often as adjective ~ed or ~ing ] tire out completely.
2》 use up (resources or reserves) completely.
↘explore (a subject) thoroughly.
3》 expel (gas or steam) from an engine or other machine.
■ noun waste gases or air expelled from an engine or other machine.
↘the system through which waste gases are expelled.
Derivatives
~edly adverb
~er noun
~ibility -'bɪlɪti noun
~ible adjective
~ingly adverb
Origin
C16: from L. ~- , exhaurire 'drain out'.