This adjective describes someone apt or skilled at teaching—a natural or developed ability to instruct others. Paul uses it twice in the Pastoral Epistles as a qualification for church leadership: an overseer must be 'able to teach' (1 Timothy 3:2), and the Lord's servant must be 'apt at teaching' (2 Timothy 2:24). The term goes beyond mere knowledge to indicate teaching skill or gift. It combines 'didactic' (teaching) with a suffix indicating aptitude or fitness. The translations 'apt to teach' (English) and 'apto para enseñar' (Spanish) preserve this sense of natural or cultivated teaching ability as a character qualification for ministry leadership.