Webster’s Revised Unabridged Dictionary · 1913 Innavigable In·nav′i·ga·ble (ĭn·năv′ĭ·gȧ·b'l), a. [L. innavigabilis : cf. F. innavigable. See In- not, and Navigable.] Incapable of being navigated; impassable by ships or vessels. Drygen. — In·nav′i·ga·bly, adv. ‹ Innative Inne ›