Related Clues:

• Inactive
• Like a couch potato
• Like helium, chemically
• Like helium
• Unreactive
• Like neon
• Like krypton or xenon
• Like argon
• Dead to the world
• Like neon or xenon
• Not reacting
• Not merely sluggish
• Lying on one's back
• Not active, chemically
• Unlikely to move