Related Clues:
- Like a dead weight
- Hard to get a reaction out of?
- Lying calmly
- Sitting still
- Like a noble gas
- Passive or idle
- Chemically unreactive
- Motionless, still
- Not moving, free from anxiety
- Passive, doing nothing
- Motionless or lifeless
- Lifeless or static
- Not doing anything, passive
- Not moving, free from trouble - maybe dead
- Actor while out of work