Impenetrable synonyms

What is another word for Impenetrable?

• inscrutable

  incomprehensible, knowledge
• incomprehensible

  knowledge, unfathomable
• unfathomable

  incomprehensible, knowledge
• impervious

  impassable, dense
• impermeable

  impervious, state
• dense

  characteristic, impassable
• inexplicable

  incomprehensible, unfathomable
• unintelligible

  incomprehensible, knowledge
• impassable

  dense
• obscure

  incomprehensible, unfathomable
• thick

  dense, impervious
• mysterious

  inscrutable, unaccountable
• impregnable

  property, invulnerable
• solid

  dense, characteristic
• tight

  state, dense
• inviolable

  unfathomable, impassable
• dark

  non-transparent
• enigmatic
• baffling

  inscrutable
• inaccessible

  impregnable, impassable
• opaque

  non-transparent
• unaccountable

  unexplainable
• hard

  complex, impervious
• unclear

  illegible
• arcane
• compact

  characteristic, property
• heavy
• cryptic

  inscrutable
• firm

  property
• invulnerable