Related Clues:

• Zonked
• Sick companion?
• Passé
• Ready to take a break
• Eager to rest
• Having no to-do plan?
• Chemically quiet
• Like one who's tried too hard
• Depleted of energy
• Hard to get a reaction out of
• Unable to react chemically
• Ready for a break
• Weak, in a sense
• Hard to combine, chemically
• In need of a break