In a thin manner:
(Economics) To make money harder to borrow or obtain.
To express (socially or personally unacceptable impulses, specif. sexual impulses) in constructive, acceptable forms, often unconsciously
To make or become subtle
Find another word for rarefy. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for rarefy, like: attenuate, thin, tighten, sublimate and subtilize.