English synonyms: impervious, impermeable, indestructible, solid, thick, unyielding
Bengali synonyms: অভেদ্য, নিবিড়, চেনার অসাধ্য, উপলব্ধি করিতে অসাধ্য, অজ্ঞেয়
“When present, it often forms dense, impenetrable thickets.”
“Lots of fields have their own jargon that is impenetrable to outsiders.”
impeccable · impede · impediment · impel · imperative · imperceptible · imperfect · imperfection
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