1. unnavigable - Adjective
2. unnavigable - Adjective Satellite
incapable of being navigated
Source: WordNetAlthough the Mekong is unnavigable due to a number of rapids, the hope was that the river might be tamed with the help of French engineering and a combination of railways. Source: Internet
Indians along the way were often paid in trade goods to help them portage around falls and unnavigable rapids. Source: Internet
Moncton lies at the original head of navigation on the river, however a causeway to Riverview (constructed in 1968) resulted in extensive sedimentation of the river channel downstream and rendered the Moncton area of the waterway unnavigable. Source: Internet
The lake has a reputation for periodically powerful, unnavigable storms. Source: Internet
The Platte proved to be unnavigable. Source: Internet
Thereafter a series of falls and rapids render the Niger unnavigable in all seasons. Source: Internet