impenetrable
adjective
[ ɪmˈpɛnɪtrəb(ə)l ]
• impossible to pass through or enter.
• "a dark, impenetrable forest"
Similar:
impassable,
unpassable,
inaccessible,
unnavigable,
untraversable,
pathless,
trackless,
untrodden,
dense,
thick,
overgrown,
jungly,
jungle-like,
thickset,
• impossible to understand.
• "her expression was impenetrable"
Similar:
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,
wildering,
insolvable,
Origin:
late Middle English: via French from Latin impenetrabilis, from in- ‘not’ + penetrabilis ‘able to be pierced’, from the verb penetrare (see penetrate).
