The Italian term "inadatto, incapace" matches the English term "incapable"

other italian words that include "inadatto" : english :
inadatto, incapace unable
inadatto, inabile al lavoro, disadatto unfit
other italian words that include "incapace" : english :
inefficiente, incapace inefficient
inadatto, incapace unable
incapace al lavoro unfit for work