impenetrable Synonyms - page 3

bewildering bushy cabalistic caecal caked caseous cassideous closed compact compacted hardened hard-handed incognizable incomprehensible incompressible indestructible indiscoverable inexplicable inexpugnable inscrutable inscrutably insoluble insolvable inspissated insuperable insusceptible invincible inviolable incantatory inapprehension heaped hermetic holocryptic illegible immune impassable impassible imperdible impermeability impermeable imperviable impervious imporous impracticably inaccessible inapprehensible invious