rarefy

1 lessen the density or solidity of; "The bones are rarefied"

2 make more subtle or refined [syn: sublimate, subtilize]

3 weaken the consistency of (a chemical substance) [syn: attenuate] [also: rarefied]

English

Verb

1. To make rare, thin, porous, or less dense
2. To expand or enlarge without adding any new portion of matter to.

Synonyms

• stretch

Antonyms

• condense

add to, adulterate, aggrandize, amplify, attenuate, augment, baptize, bloat, blow up, broaden, build, build up, bulk, bulk out, crescendo, cut, dematerialize, develop, dilate, dilute, disembody, distend, emacerate, emaciate, enervate, enlarge, etherealize, expand, extend, hike, hike up, huff, increase, inflate, irrigate, magnify, puff, puff up, pump, pump up, raise, reduce, sap, spiritualize, stretch, subtilize, sufflate, swell, thin, thin away, thin down, thin out, up, water, water down, weaken, widen