Related Clues:

• Like some phones or weights
• Word with "duck" or "end"
• Hard to get a reaction out of
• Like a spent battery
• Lookalike
• Unable to react chemically
• Word with "even" or "heat"
• Gone to glory
• Hard to combine, chemically
• Nonreactive, as some gases
• No longer alive
• "Fifteen men on the ___ man's chest"
• __ end
• Like dead weight
• Nonreactive, chemically