Related Clues:
- Unlikely to react
- Unlikely to form compounds
- Like xenon, as gases go
- Like some gas elements
- Like group 18 elements
- Totally unreactive
- Without any oomph
- Chemically nonreactive, as a gas
- Slower than 43-Down
- Lifeless type up north in hospital with temperature
- Like a pocketful of krypton
- Not moving, lifeless
- Not showing much life
- Like helium and neon
- Slow to react