penetrable Antonyms

impenetrable beyond your ken shellproof perplexing obscure mysterious mackintosh irresolvable invulnerable inscrutable incomprehensible incognizable inclosed impervious imperviable thick unfathomable beyond comprehension waterproofed rustproof rainproof entranceless all-conquering water-resistant nonporous burglarproof raincoat bulletproof light-tight leakproof airtight impermeable exceptional impassable complex compact cloudy blockaded bizarre bewildering barred ballproof baffling astonishing arcane ambiguous advanced complicated curious debatable