yetenek
yeteneklilik
(Turkish - English dictionary) :
ability, capability, capableness, competence; talent; aptness.
yeteneksiz
(Turkish - English dictionary) :
lacking in ability, incapable, incompetent; untalented; inapt, inept.
yeteneksizlik
(Turkish - English dictionary) :
inability, incapability, incapableness, incompetence; lack of talent; inaptness, ineptness.