| 单词 | rarefy |
| 释义 | rarefy v. (-ies, -ied) 1. tr. & intr. make or become less dense or solid (rarefied air). 2. tr. purify or refine (a person's nature etc.). 3. tr. make (an idea etc.) subtle. Derivatives rarefaction n. rarefactive adj. rarefication n. Etymology: ME f. OF rarefier or med.L rarificare f. L rarefacere f. rarus rare + facere make |
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