Related Clues:

• Like neon
• Like krypton or xenon
• Like argon
• Dead to the world
• Like neon or xenon
• Not reacting
• Not merely sluggish
• Not active, chemically
• Unlikely to move
• Without energy
• Stagnant
• Like xenon
• Like xenon and neon
• Heliumlike
• Lethargic