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1. Supplying motive force
   - energising [Brit], kinetic

1. The activity of causing to have energy and be active
   - activating, activation, energising [Brit]

1. Cause to be alert and energetic
   - stimulate, arouse, brace, energise [Brit], perk up
    
2. Raise to a higher energy level
   - excite, energise [Brit]

See also: dynamic, dynamical, energizer, energy

Type of: activity, affect, alter, change, modify

Antonym: de-energize