rarefy

英

美

网络  使稀少; 稀薄; 使稀薄; 变稀薄; 使稀少,使稀薄

过去式：rarefied　过去分词：rarefied　现在分词：rarefying　第三人称单数：rarefies　

TOEFL

BNC.42344 / COCA.34861

英英释义

verb

• weaken the consistency of (a chemical substance)
  Synonym:attenuate
• make more subtle or refined
  Synonym:sublimatesubtilize
• lessen the density or solidity of
  1. The bones are rarefied