| Word | Definitions | Synonyms |
|---|---|---|
| rarefy | (verb) weaken the consistency of (a chemical substance) | Synonyms: attenuate |
| (verb) make more subtle or refined | Synonyms: sublimate, subtilize | |
| (verb) lessen the density or solidity of | - | |
| rarify | (verb) make more complex, intricate, or richer | Synonyms: complicate, elaborate, refine |