Decrease and Exhaust

decrease

A change downward.
- usage: "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
- synonyms: lessening, drop-off
A process of becoming smaller or shorter.
- synonyms: decrement
The amount by which something decreases.
- synonyms: decrement
The act of decreasing or reducing something.
- synonyms: diminution, reduction, step-down

Decrease in size, extent, or range.
- usage: "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
- synonyms: diminish, lessen, fall
Make smaller.
- usage: "He decreased his staff"
- synonyms: lessen, minify

(v.t.) To cause to grow less; to diminish gradually; as, extravagance decreases one's means.
(v.) A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
(n.) To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc. or in strength, quality or excellence; as, they days decrease in length from June to December.
(v.) The wane of the moon.

Webster's Revised Unabridged Dictionary

exhaust

Gases ejected from an engine as waste products.
- synonyms: exhaust fumes, fumes
System consisting of the parts of an engine through which burned gases or steam are discharged.
- synonyms: exhaust system

Wear out completely.
- usage: "This kind of work exhausts me"; "I'm beat"; "He was all washed up after the exam"
- synonyms: wash up, beat, tucker, tucker out
Use up (resources or materials. )
- usage: "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"
- synonyms: consume, eat up, use up, eat, deplete, run through, wipe out
Deplete.
- usage: "exhaust one's savings"; "We quickly played out our strength"
- synonyms: run down, play out, sap, tire
Use up the whole supply of.
- usage: "We have exhausted the food supplies"
Eliminate (a substance. )
- usage: "combustion products are exhausted in the engine"; "the plant releases a gas"
- synonyms: discharge, expel, eject, release

(v.t.) 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.
(v.t.) To empty by drawing or letting out the contents; as, to exhaust a well or a treasury.
(v.t.) To bring out or develop completely; to discuss thoroughly; as, to exhaust a subject.
(n.) The steam let out of a cylinder after it has done its work there.
(a.) Pertaining to steam, air, gas, etc., that is released from the cylinder of an engine after having preformed its work.
(n.) The foul air let out of a room through a register or pipe provided for the purpose.
(v.t.) 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.
(v.t.) 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.
(a.) Drained; exhausted; having expended or lost its energy.

Webster's Revised Unabridged Dictionary