Synonyms of 'navigable'
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If a surface, place, or view is clear, it is free of unwanted objects or obstacles.
All exits must be kept clear in case of fire or a bomb scare.
An area of land that is negotiable is easy to travel across.
Parts of the road had been washed away, but it was still negotiable.
Thesaurus for navigable from the Collins English Thesaurus
A navigable river is wide and deep enough for a boat to travel along safely.