Impenetrable synonyms | phrases

Phrases with similar meaning for Impenetrable

• jam-packed
• rock-hard
• beyond one
• poker-faced
• hermetically sealed

  waterproof
• close-knit
• little known
• impossible to understand

  incomprehensible
• tightly packed
• water-resistant
• closed to
• beyond comprehension
• out of reach
• pitch-dark
• water-repellent
• close-packed
• well fortified
• well defended
• close-grained
• fine-grained
• round-about
• chock-full
• like sardines
• far-out
• clear as mud
• tied up
• packed like sardines
• nip and tuck
• mind-bending
• hard-boiled
• hard-bitten
• case-hardened
• hard-as-nails
• out of sight
• not in sight
• beats me
• hard as nails
• hard-handed
• unheard-of
• too deep
• neck and neck
• unheard of
• beyond grasp
• rock hard
• round about
• cold-blooded
• puncture-proof

  impervious
• jungle-like

  dense
• pitch dark
• out-of-bounds