| Rating | Solver | Clue |
|---|---|---|
| ADULTERATE | Make impure | |
| CONTAMINATE | Make something impure | |
| DEFILE | To make foul or impure; to make filthy; to dirty; to befoul; to pollute. | |
| POLLUTE | To make foul, impure, or unclean; to defile; to taint; to soil; to desecrate; -- used of physical or moral defilement. |