| Rating | Solver | Clue |
|---|---|---|
| PURE | Clean (air) | |
| IMPURE | Not pure; not clean; dirty; foul; filthy; containing something which is unclean or unwholesome; mixed or impregnated extraneous substances; adu... | |
| FOUL | ...ich is injurious, noxious, offensive, or obstructive; filthy; dirty; not clean; polluted; nasty; defiled; as, a foul cloth; foul hands; a foul ... |