Origin: Latin suffix -able
Incapable has 6 different meanings across 1 category:
One who is morally or mentally weak or inefficient; an imbecile; a simpleton.
"After he accidentally deleted the entire company database while claiming to be the new IT manager, everyone realized that his boss was completely incapable of handling such a critical role."
(followed by `of') lacking capacity or ability
"incapable of carrying a tune"
"he is incapable of understanding the matter"
"incapable of doing the work"
not being susceptible to or admitting of something (usually followed by `of')
"incapable of solution"
(followed by `of') not having the temperament or inclination for
"simply incapable of lying"
Not capable (of doing something); unable.
"After spending all night studying, I was completely incapable of focusing on my exam questions."