| RARE | a decrease in the density of something |
|---|---|
| RARE | of high moral or intellectual value |
| RARE | reserved for an elite group |
| RARE | having low density |
| RARE | weaken the consistency of (a chemical substance) |
| RARE | make more subtle or refined |
| RARE | lessen the density or solidity (of a substance) |
| RARE | not often |
| RARE | noteworthy scarcity |