Related Clues:

• Heliumlike
• Lethargic
• Not reacting chemically
• Like a bump on a log
• Nonreactive
• Unresponsive
• Unable to move
• Not at all active
• Powerless to act
• Doing nothing
• Torpid
• Apt to stay put
• Less than slow
• Sitting around
• Like neon and helium