rarefy
[verb]
Synonyms: thin, attenuate

[TahlilGaran] English Synonym Dictionary ▲

rarefy verb. ['rɛ:rɪfʌɪ] LME.
[Old & mod. French raréfier or medieval Latin rareficare extension of Latin rarefacere, formed as RARE adjective¹: see -FY.]
1. verb trans. & (rare) intrans. Make or become thin, esp. by expansion; make or become less dense or solid. LME.

2. verb trans. fig. Make less material; make (an idea, argument, etc.) more subtle; refine, purify. L16.

■ rarefi'cation noun (rare) = RAREFACTION E17.

■ rarefier noun (rare) L16.

[TahlilGaran] English Dictionary ▲