Definition

1. Adjective:
   • Incapable of being navigated: Describes a body of water, such as a river, channel, or sea, that is not safe or suitable for ships or boats to travel through. This can be due to obstacles, shallow depth, dangerous currents, or ice.

Usage

The word "unnavigable" is used to describe waterways. It is a formal term often found in geographical, maritime, or logistical contexts. It is the direct opposite of "navigable."

Examples

• Adjective:
  • The river was rendered unnavigable after the severe drought exposed rocks and sandbars.
  • The coastguard warned that the narrow strait was unnavigable for large vessels due to the reef.
  • Ice made the northern sea routes completely unnavigable for several months.

Advanced Usage

• "deemed unnavigable": officially declared or considered impossible to navigate.
  • The old canal was deemed unnavigable and was closed to commercial traffic.
• "effectively unnavigable": practically impossible to navigate, even if not officially declared so.
  • Without the proper charts, the estuary is effectively unnavigable.

Variants and Related Words

• Navigable (adj): (of a waterway) wide, deep, or safe enough for vessels to pass through.
  • The Mississippi River is a major navigable waterway.
• Navigation (n): the process or activity of accurately ascertaining one's position and planning and following a route.
• Navigability (n): the quality of being navigable.

Synonyms

• Impassable: Impossible to travel along or over.
• Unpassable: Not able to be passed or crossed. (Note: "Impassable" is more common than "unpassable").
• Blocked: Obstructed, preventing passage.

Antonyms

• Navigable: Capable of being navigated.
• Passable: Able to be traveled on or through.

Adjective

1. incapable of being navigated