動(dòng)詞 rarefy:

1. lessen the density or solidity of
2. make more subtle or refined
   同義詞：sublimate, subtilize
3. weaken the consistency of (a chemical substance)
   同義詞：attenuate

1. The rarefied fluid said to run in the veins of the gods.
   靈液諸神血管里流動(dòng)著的稀有液體
2. He moves in very rarefied circles; his friends are all lords.
   他活動(dòng)于上流階層，結(jié)交的盡是貴族。

rarefy 也作 rar.i.fy

v.（動(dòng)詞）
rar.e.fied,rar.e.fy.ing,rar.e.fies
v.tr.（及物動(dòng)詞）
To make thin, less compact, or less dense.
使稀?。菏棺兪?，變淡，變得不緊湊，不濃密
To purify or refine.
精煉：使變純或變精
v.intr.（不及物動(dòng)詞）
To become thin or less compact or dense.
變稀薄，變得不濃

來源：
Middle English rarefien
中古英語 rarefien
from Old French rarefier
源自 古法語 rarefier
from Medieval Latin r3rific3re
源自 中世紀(jì)拉丁語 r3rific3re
alteration of Latin r3rôfacere
拉丁語 r3rôfacere的變化
r3rus [rare]
r3rus [稀有的]
facere [to make] * see dhô-
facere [使] *參見 dhô-

【引伸】
rar.efi.able
adj.（形容詞）