From The Collaborative International Dictionary of English v.0.48 [gcide]:
Exhaust \Ex*haust"\, v. t. [imp. & p. p. {Exhausted}; p. pr. &
vb. n. {Exhausting}.] [L. exhaustus, p. p. of exhaurire; ex
out + haurire, haustum, to draw, esp. water; perhaps akin to
Icel. asua to sprinkle, pump.]
1. To draw or let out wholly; to drain off completely; as, to
exhaust the water of a well; the moisture of the earth is
exhausted by evaporation.
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2. To empty by drawing or letting out the contents; as, to
exhaust a well, or a treasury.
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3. To drain, metaphorically; to use or expend wholly, or till
the supply comes to an end; to deprive wholly of strength;
to use up; to weary or tire out; to wear out; as, to
exhaust one's strength, patience, or resources.
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A decrepit, exhausted old man at fifty-five.
--Motley.
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4. To bring out or develop completely; to discuss thoroughly;
as, to exhaust a subject.
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5. (Chem.) To subject to the action of various solvents in
order to remove all soluble substances or extractives; as,
to exhaust a drug successively with water, alcohol, and
ether.
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{Exhausted receiver}. (Physics) See under {Receiver}.
Syn: To spend; consume; tire out; weary.
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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Exhausting \Ex*haust"ing\, a.
Producing exhaustion; as, exhausting labors. --
{Ex*haust"ing}, adv.
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From WordNet (r) 3.0 (2006) [wn]:
exhausting
adj 1: having a debilitating effect; "an exhausting job in the
hot sun" [syn: {draining}, {exhausting}]
2: producing exhaustion; "an exhausting march"; "the visit was
especially wearing" [syn: {exhausting}, {tiring}, {wearing},
{wearying}]
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