/in ferr"mi tee/ , n. , pl. infirmities for 1, 3.
1. a physical weakness or ailment: the infirmities of age.
2. quality or state of being infirm; lack of strength.
3. a moral weakness or failing.
[ 1325-75; ME infirmite infirmitas. See INFIRM, -ITY ]
Syn. 3. flaw, defect, fault.