| Answer | Crossword Clue |
|---|---|
| INERT | Like sulfur hexafluoride |
| sulfurous | Like sulfur in color; pale yellow |
| nielli | any of several black enamel-like alloys usually of sulfur with silver, copper, and lead |
| niello | any of several black enamel-like alloys usually of sulfur with silver, copper, and lead |
| niellos | any of several black enamel-like alloys usually of sulfur with silver, copper, and lead |
