Synonyms of impenetrable in English:

impenetrable


See definition of impenetrable

adjective

1‘the ships had impenetrable armoured plating’

SYNONYMS
impervious, impermeable, solid, dense, thick, hard, unyielding, unbreakable, indestructible, puncture-proof, unpierceable, resistant
invulnerable, impregnable, inviolable, unattackable, unassailable
waterproof, closed, sealed, hermetically sealed, tight
secure, safe, fortress-like
ANTONYMS

permeable, vulnerable

2‘a dark, impenetrable forest’

SYNONYMS
impassable, unpassable, inaccessible, unnavigable, untraversable, pathless, trackless, untrodden
dense, thick, overgrown, jungly, jungle-like
archaic thickset
ANTONYMS

accessible, sparse

3‘an impenetrable clique’

SYNONYMS
exclusive, closed, secretive, secret, private
restrictive, restricted, limited
rare discriminative
ANTONYMS

open

4‘these statistics can seem impenetrable and tedious’

SYNONYMS
incomprehensible, impossible to understand, unfathomable, fathomless, inexplicable, unintelligible, unclear, baffling, bewildering, puzzling, perplexing, confusing, abstruse, obscure, opaque, recondite, inscrutable, mysterious, cryptic, Delphic
complex, complicated, difficult, hard
archaic wildering
rare insolvable
ANTONYMS

clear