| Answer | Crossword Clue |
|---|---|
| ANNEAL | Toughen glass |
| ANNEAL | Toughen, as glass |
| ANNEAL | Toughen by heating, as glass |
| annealer | to toughen or temper (metal or glass) |
| annealed | to toughen or temper (metal or glass) |
| anneals | to toughen or temper (metal or glass) |
| anneal | to toughen or temper (metal or glass) |
| annealers | to toughen or temper (metal or glass) |
| annealing | Heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it |
