From over- + apt.
overapt (comparative more overapt, superlative most overapt)
- Excessively apt or prone to do something.
1845, Walter Campbell, The Old Forest Ranger: Or, Wild Sports of India, page 237:She was high-minded, generous, affectionate, and naturally gentle; but she was wilful, overapt to be hurried away by the impulse of the moment, and impatient of control; […]