drain (someone) of their physical or mental resources; tire out 使精疲力竭;使绞尽脑汁 her day out had exhausted her. 外出一天使她精疲力竭。 [as adj. exhausting]it had been a long and exhausting day. 那是十分漫长,让人疲惫不堪的一天。
use up (resources or reserves) completely 耗尽(资源,储备物) the country has exhausted its treasury reserves. 该国财源已经耗尽。 ■expound on, write about, or explore (a subject or options) so fully that there is nothing further to be said or discovered 详尽无遗地论述(某一题目);对(各种选择)进行穷尽性探究 she seemed to have exhausted all permissible topics of conversation. 她似乎已将能谈的话题都谈尽了。
expel (gas or steam) from or into a particular place 排光(气体,蒸汽)
noun
[mass noun]waste gases or air expelled from an engine, turbine, or other machine in the course of its operation 废气 buses spewing out black clouds of exhaust. 喷着团团黑色浓烟的公共汽车。 [as modifier]exhaust fumes. 排烟。 ■[count noun]the system through which such gases are expelled 排气系统 [as modifier]an exhaust pipe. 排气管。
mid 16th cent. (in the general sense 'draw off or out'): from Latin exhaust- 'drained out', from the verb exhaurire, from ex- 'out' + haurire 'draw (water), drain'