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impenetrable

see definition of impenetrable
  • adjdense
  • adjincomprehensible
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Synonyms for impenetrable

adj dense
  • bulletproof
  • impassable
  • impervious
  • close
  • compact
  • firm
  • hard
  • hermetic
  • impermeable
  • inviolable
  • solid
  • substantial
  • thick
  • unpiercable

Antonyms for impenetrable

  • open
  • clear
  • comprehensible
  • intelligible
  • penetrable
  • permeable
  • porous
  • soft
  • thin
  • understandable
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

More words related to impenetrable

adamant

adjective. hard like rock
  • adamantine
  • flinty
  • impenetrable
  • indestructible
  • rock-hard
  • tough
  • unbreakable

close

adjective. dense, cramped
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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