weakness

noun3

1. •
   the state of having little strength or power

   • In a small number of horses, muscle weakness may progress to paralysis.
2. •
   An inadequate quality; fault.

   • His inability to speak in front of an audience was his weakness.
   • The only weakness in her plan was its reliance on the electricity being up and running.
3. •
   A special fondness or obsessing desire.

   • She is an athlete who has a weakness for chocolate.