1ex·haust 
/ɪgˈzɑ:st/ verb
ex·hausts; ex·haust·ed; ex·haust·ing /ɪgˈzɑ:st/ verb [+ obj] 1 : to use all of someone's mental or physical energy : to tire out or wear out (someone) completely
▪ If you keep working these long hours, you're just going to exhaust yourself. = Working these long hours will just exhaust you. 2 a : to completely use up (something, such as supplies or money)
▪ If they keep spending this way, they'll exhaust their savings.
b : to try all of (something)
▪ They've exhausted (all) the possibilities. [=they've tried everything they can] 3 : to consider or talk about (a subject) thoroughly or completely
▪ He can talk about baseball for hours and still feel that he hasn't exhausted the subject/topic.
▪ If you keep working these long hours, you're just going to exhaust yourself. = Working these long hours will just exhaust you.
▪ If they keep spending this way, they'll exhaust their savings.
b : to try all of (something)
▪ They've exhausted (all) the possibilities. [=they've tried everything they can]
▪ He can talk about baseball for hours and still feel that he hasn't exhausted the subject/topic.
— exhausted adjective [more exhausted; most exhausted]
▪ The children were exhausted after their day at the beach. ▪ She collapsed on her bed, totally exhausted.
▪ The children were exhausted after their day at the beach. ▪ She collapsed on her bed, totally exhausted.
— exhausting adjective [more exhausting; most exhausting]
▪ It was an exhausting day at the beach. ▪ We have an exhausting amount of work to do.
▪ It was an exhausting day at the beach. ▪ We have an exhausting amount of work to do.
— ex·haust·ing·ly adverb
▪ They worked exhaustingly long hours.
▪ They worked exhaustingly long hours.
