Innavigable
Pronunciation : In*nav"i*ga*ble
Part of Speech : a.
Etymology : [L. innavigabilis : cf. F. innavigable. See In- not, and Navigable.]
Definition : Defn: Incapable of being navigated; impassable by ships or vessels. Drygen. -- In*nav"i*ga*bly, adv.
Source : Webster's Unabridged Dictionary, 1913