Related Clues:

• Sitting around
• Like neon and helium
• Like couch potatoes
• Lacking energy
• Well fixed
• Like noble gases
• Listless
• Lethargic, perhaps
• Like radon
• Like krypton and xenon
• Languid
• Inanimate
• Lacking liveliness
• Like neon and xenon
• Like neon and argon