Impassable (adjective) — غير قابل للعبور: Impossible to travel through or across. Below are 8 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Impossible to enter, pass through, or understand. An impenetrable wall, forest, or argument cannot be pierced. Not impending (coming soon), not imperative…
blockedclosedunpassableunnavigableobstructedbarredjammed
Impossible to overcome.
Too great to be overcome.