Sublimate is defined as to cause the change of a gas into a solid or a solid into a gas without becoming a liquid, or to have a refining effect on someone or something.
Attenuate is defined as to reduce the strength of an electrical signal.
So as to be thin:
The definition of tighten is to make something more fixed in place, more constricted, or more snug.
Find another word for rarefies. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for rarefies, like: sublimates, attenuates, thins and tightens.