Ableness

[…]not that we are ſufficient of oure ſelues to thynke eny thinge, as of oure ſelues, but oure ableneſſe commeth of God,[…]

Source: wiktionary

[…] in ſtead of a brother ſhe [Empress Matilda] had a ſonne grew vp to be of more eſtimatiõ with the Nobilitie, and ſhortly after of ablenes to vndergo the trauailes of warre.

Source: wiktionary

[…] the true use and function of property […] as also of honors, titles, preferments, and place, and all favor and acquaintance of persons of quality or ableness, are but to get money.

Source: wiktionary

She knew how to do things and make things and even her good looks were competent, a straightforward sort of ableness, open and clear-eyed, with a smatter of fading freckles and a dirty-minded smile.

Source: wiktionary