| Answer | Crossword Clue |
|---|---|
| REFINE | Remove impurities from |
| SMELT | Remove impurities from |
| DISTILL | Remove impurities from, in a way |
| scrubbing | Remove impurities from (gas or vapor) |
| scrubbed | Remove impurities from (gas or vapor) |
| scrubs | Remove impurities from (gas or vapor) |
| boil | to remove (sizing, wax, impurities, or the like) from a fabric by subjecting it to a hot scouring solution |
