Found 70 synonyms in 10 groups
  1. 2
    Meaning: illegible
  2. 4
    Meaning: state
  3. 5
    Meaning: property
  4. 6
    Meaning: characteristic
  5. 7
    Meaning: impervious
  6. 9
    Meaning: dense
  7. 10
    Meaning: non-transparent

impenetrable synonyms - English related words for impenetrable