rarefy

vt. 使稀少, 使稀薄, 使纯化, 精炼 vi. 变稀少, 变稀薄

发音

其它 /ˈɹɛəɹəˌfaɪ/

词形变化

rarefied rarefies 三单 rarefies rarefieth rarefying rarefying 现在分词 rarefied 过去式 rarefied 过去分词

别名

rarify

释义与例句

v.
  1. 1.

    To make rare, thin, porous, or less dense.

    及物
  2. 2.

    To become rare, thin or less dense.

    不及物

词汇关系

动词

同义词 3

attenuate sublimate subtilize

上位词 4

change alter weaken modify

词源

From Middle English rarefien, from Old French rarefier (French raréfier), from Latin rarefacere (“make rare”). By surface analysis, rare + -fy.

来源：wiktionary