unnavigable

comparative more unnavigable · superlative most unnavigable · alternative unnavigatable

1. Not navigable: difficult or impossible to navigate.

   unnavigable website

   1 more example

   Near-synonym: impassible

   Synonyms: innavigable, impassible · Antonyms: navigable

   1. nauticalImpossible to sail through; impassible to watercraft, unusable as a waterway (for example, too shallow).

      A road journey of 70 miles past unnavigable rapids leads to Juba, from which it is seven days' steaming down river through to Kosti, on the Sudan Railways.

      1950 May, Timothy H. Cobb, “The Tanganyika Railway”, in Railway Magazine, page 298

      3 more examples

      Theſe flatts make it unnavigable for ſhippes, yet at high vvater great Boates, Loiters, and Pinnaces of 20, and 30 tun, may ſaile up to the plantation, but they neede have a skilfull Pilote, becauſe of many dangerous rockes and foaming breakers, that lye at the mouth of that Bay.

      1634, William Wood, “Of The Severall Plantations in Particular”, in New Englands Prospect. A True, Lively, and Experimentall Description of that Part of America, Commonly Called New England; […], London: […] Tho[mas] Cotes, for Iohn Bellamie, […], →OCLC, 2nd part (Of the Indians, […]), page 66

      Nang county is the name given to the present administrative division of E Dakpo, the principal gateway to the sacred mountain of Tsari, and the region through which the Brahmaputra River cuts its way through an unnavigable 33 km horse-shoe gorge as it flows towards Longpo and Kongpo.

      1996 January, “Southern Tibet”, in Gyurme Dorje, editor, Tibet Handbook: with Bhutan, Passport Books, →ISBN, →LCCN, →OCLC, page 288, column 1

      The vast plateau of the Massif Central was still the fortress it had been when the Arverni tribes held out against the Romans. Its rivers were unnavigable and its links to the rest of France practically non-existent.

      2007, Graham Robb, “Chapter 1: The Undiscovered Continent”, in The Discovery of France: A Historical Geography, W.W. Norton and Company, →ISBN, page 21

      Synonyms: innavigable, impassible · Antonyms: navigable

   2. trail; or route; trail; or routeThat is totally impassible: cannot be used for any reason.

      The trail was unnavigable since the flood washed it away.

      Synonyms: innavigable, impassible · Antonyms: navigable