weak·ness 
/ˈwi:knəs/ noun
plural weak·ness·es /ˈwi:knəs/ noun 1 [noncount] : the quality or state of being weak
▪ muscle weakness ▪ The weakness of her voice surprised me. ▪ The incident exposed his weakness as a leader. ▪ Some see compromise as a sign of weakness. ▪ moral weakness ▪ the weakness of a radio signal/Internet connection ▪ the weakness of the dollar/economy ▪ I told them my secret in a moment of weakness. 2 [count] : a quality or feature that prevents someone or something from being effective or useful
▪ The tutor assessed the student's strengths and weaknesses. ▪ The basketball team has few weaknesses. 3 [count] a : something that you like so much that you are often unable to resist it
▪ Chocolate is my greatest weakness.
b : a strong feeling of desire for something
▪ He has a weakness for desserts.
▪ muscle weakness ▪ The weakness of her voice surprised me. ▪ The incident exposed his weakness as a leader. ▪ Some see compromise as a sign of weakness. ▪ moral weakness ▪ the weakness of a radio signal/Internet connection ▪ the weakness of the dollar/economy ▪ I told them my secret in a moment of weakness.
▪ The tutor assessed the student's strengths and weaknesses. ▪ The basketball team has few weaknesses.
▪ Chocolate is my greatest weakness.
b : a strong feeling of desire for something
▪ He has a weakness for desserts.
