Unnavigable

adj

Definitions

Adjective
  1. 1
    Not navigable: difficult or impossible to navigate.

    "Near-synonym: impassible"

  2. 2
    Not navigable: difficult or impossible to navigate.; Impossible 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."

  3. 3
    Not navigable: difficult or impossible to navigate.; That is totally impassible: cannot be used for any reason.

    "The trail was unnavigable since the flood washed it away."

Adjective
  1. 1
    incapable of being navigated wordnet

Etymology

From un- + navigable.

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