impassable

untraversable

Cannot be crossed

• unfordableToo deep to wade
• impenetrableImpossible to pass through
• treacherousDisloyal and dangerous

boggy · swampy · muddy · flooded · snowbound · icebound · rocky · rugged · dense · overgrown

insurmountable

Impossible to overcome

• insuperableImpossible to overcome
• unconquerableImpossible to defeat
• overwhelmingIntensely excessive in force

impossible · hopeless · intractable · insoluble · unbridgeable · unbreachable · impregnable · unyielding · immovable · invincible

roadblock

Obstruction across a road

• barricadeObstacle blocking a path
• blockadeSealing off a place
• closureSense of emotional resolution

obstruction · blockage · clogged · congested · gridlock · deadlock · logjam · jam · snarl-up · chokepoint

wall

Vertical enclosing structure

• fenceBoundary structure between properties
• gateHinged barrier in fence
• checkpointInspection station on route

fortification · barricade · moat · palisade · bulwark · rampart · cordon · perimeter · boundary · border

• path conditionsmuddy, rocky, icy, slippery, wet
• terrain wordshilly, rocky, muddy, sandy, flat
• inaccessibleinaccessible, unreachable, out of reach, unobtainable, unattainable
• obstacle wordsblocking, steep, slippery, treacherous, hazardous
• blizzardwhiteout, snowstorm, snow, wind, ice
• water qualitiesmurky, taste, odor, color, fresh