Thayer's Greek Lexicon

 1. want of strength, weakness, infirmity
  1) of the body
1a1. its native weakness and frailty
1a2. feebleness of health or sickness
  2) of the soul
1b1. want of strength and capacity requisite
1b  1) to understand a thing
1b  2) to do things great and glorious
1b  3) to restrain corrupt desires
1b  4) to bear trials and troubles