listen to the pronunciation of unnavigable
İngilizce - Türkçe
{s} denize açılamaz
{s} denize açılmaya müsait olmayan
İngilizce - İngilizce
that cannot be used for any reason

The trail was unnavigable since the flood washed it away.

not navigable; impossible to sail through
{a} not to be navigated or sailed
{s} impossible to be navigated, cannot be traversed
impossible to sail through