RAREFY
rarefy, attenuate
(verb) weaken the consistency of (a chemical substance)
rarefy, sublimate, subtilize
(verb) make more subtle or refined
rarefy
(verb) lessen the density or solidity of; “The bones are rarefied”
Source: WordNet® 3.1
Etymology
Verb
rarefy (third-person singular simple present rarefies, present participle rarefying, simple past and past participle rarefied)
To make rare, thin, porous, or less dense
To expand or enlarge without adding any new portion of matter to.
Synonyms
• stretch
Antonyms
• condense
Anagrams
• Frayer, Frayre, fayrer
Source: Wiktionary
Rar"e*fy, v. t. [imp. & p. p. Rarefied; p. pr. & vb. n. Rarefying.]
Etym: [F. raréfier; L. rarus rare + -ficare (in comp.) to make; cf.
L. rarefacere. See -fy.]
Definition: To make rare, thin, porous, or less dense; to expand or enlarge
without adding any new portion of matter to; -- opposed to condense.
Rar"e*fy, v. i.
Definition: To become less dense; to become thin and porous. "Earth
rarefies to dew." Dryden.
Source: Webster’s Unabridged Dictionary 1913 Edition