rarefy

Definition

To make or become less dense or more refined, often in a literal or metaphorical sense.

हिन्दी कम सघन या अधिक सुधारित बनाना या बन जाना, अक्सर शाब्दिक या रूपक अर्थ में।

Example

"At high altitudes, the air becomes rarefied and breathing becomes difficult."