Thayer's Greek Lexicon

 1. to be strong
  1) to be strong in body, to be robust, to be in sound health
2. to have power
  1) to have power as shown by extraordinary deeds
2a1. to exert, wield power, to have strength to overcome
  2) to be a force, avail
  3) to be serviceable
  4) to be able, can