| 单词 | rarefy |
| 释义 | Word Frequency rarefy(ˈrɛərɪˌfaɪ) verbWord forms: -fies, -fying or -fied to make or become rarer or less dense; thin out Derived forms rarefiable (ˈrareˌfiable) adjective rarefier (ˈrareˌfier) noun Word origin C14: from Old French raréfier, from Latin rārēfacere, from rārus rare1 + facere to make |
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