Webster’s Revised Unabridged Dictionary · 1913
Excusable
Ex·cus′a·ble (ĕks·kūz′ȧ·b'l) a. [L. excusabilis: cf. F. excusable. See Excuse.] That may be excused, forgiven, justified, or acquitted of blame; pardonable; as, the man is excusable; an excusable action. — Ex·cus′a·ble·ness, n. — Ex·cus′a·bly, adv.
The excusableness of my dissatisfaction. Boyle.