- exhausting
- exhaustive, exhaustingBoth words are derived from the verb exhaust, but relate to different meanings. Exhaustive relates to the meaning ‘use up the whole of’ (as in exhausting a supply) and means ‘thorough or comprehensive’:
• We have all read the Steering Committee's exhaustive report —D. Meiring, 1979
• Now, after exhaustive research covering more than 2,500 Premiership matches, it has been proved: referees are ‘homers’ —Times, 2006.
Exhausting relates to the meaning ‘to tire (a person)’ and means ‘extremely tiring’ or ‘draining of strength’:• He's known as the studio's resident Romeo, with a social life and a string of girlfriends which must be exhausting rather than exhilarating —Leicester Chronicle, 1976.
Beware of using exhaustive when you mean exhausting: ☒• All of this may have been down to tiredness after an exhaustive season in lifting the Heineken Cup in May —Mirror, 2006.
Modern English usage. 2014.