Related Clues:

• It keeps things going
• Ho-hum state
• Physics concept
• Property of matter
• Couch potato's state
• Lack of activity
• Resis-tance to change
• Disinclination to move
• Blah feeling
• Resistance to motion
• Idleness
• Cause of some sighs
• 'I'm so bored' feeling
• Bored feeling
• Deep boredom