rarefy

英 ['reərɪfaɪ] 美 ['rɛrə,fai]
  • vt. 使纯化;变稀薄;精选
  • vi. 变稀薄;纯化
TOEFL
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rarefy 变稀薄,使高雅

来自 rare,稀薄的,罕见的,-fy,使。引申词义使精深,使高雅。

rarefy (v.)
late 14c., from Old French rarefier (14c.) and directly from Medieval Latin rarificare, from Latin rarefacere "make rare," from rarus "rare, thin" (see rare (adj.1)) + facere "to make" (see factitious). Related: Rarefied.