impassability

State of unpassable

Impassability is the quality of being impossible to travel through or across.

Roads may have impassability due to flooding, snow, or landslides.

The term appears in travel advisories, military planning, and geographic descriptions: The impassability of the mountain passes in winter isolated the village for months.

physical

blockage

Obstruction halting movement

barrier · bottleneck · chokepoint · deadend · clog · jam · snarl · gridlock · logjam · congestion

terrain

roughness

Uneven surface quality

remoteness · wilderness · marshland · swampland · quagmire · ravine · gorge · chasm · crevasse · thicket

abstract

insurmountability

State of being unconquerable

impediment · obstacle · restriction · prohibition · preclusion · inflexibility · rigidity · deadlock · stalemate · immovability

Opposites
traversability

impassabilitypassability

Sufficient to get through

navigability · openness · clearness · accessibility · permeability

accessibility

impassabilityaccessibility

Ease of approach

reachability · approachability · openness · unobstructedness · availability

Family

pass, passage, passport, surpass, passable, trespass, impasse, impassive, impassioned

Familiarity
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Used worldwide · Timeless · Everyday, not technical · Rated G