Related Clues:

• Galilean concept
• Subject of Newton's first law
• Tendency to remain unchanged
• It keeps things moving
• Strangely, I earn it in doing nothing
• Unwillingness to be proactive, perhaps
• One gets to retain rough stationary position
• Way of selling art that is in fashion
• Repairing train that is remaining motionless?
• Stagnating state - in time it is in recession
• 'Strenua nos exercet -' (Horace)
• A disinclination to act in opening of Educating Rita, possibly
• Reluctance to move shown by train, i.e. after crash
• Add this to multiply a number by ten - dead easy!
• Tendency not to act