| Answer | Crossword Clue |
|---|---|
| ENURE | Toughen by exposure |
| PLANISH | Toughen metal by hammering |
| ANNEAL | Toughen by heating, as glass |
| planish | to toughen and smooth by hammering lightly |
| planishes | PLANISH, to toughen and smooth by hammering lightly |
| planishing | PLANISH, to toughen and smooth by hammering lightly |
| planished | PLANISH, to toughen and smooth by hammering lightly |
