1 (of a waterway or sea) able to be sailed on by ships or boats.
1.1 (of a track or road) suitable for vehicles.
2 (of a website) easy to move around in.
Early 16th century from French navigable or Latin navigabilis, from the verb navigare ‘to sail’ (see navigate).
The ranch roads were generally navigable, even without an SUV, but Joe had to get out at every gate to open it, drive through and then close it again.