(p. 51) aprabēśya impermeable; impervious; impenetrable. অপ্রবেশ্য শিলা (geol.) an impervious rock. 27)

(p. 63) abhēda absence of difference or distinction or dissimilarity or discrimination; identity, oneness; similarity; unity. a. identical; similar, like. অভেদাত্মা a. (of two persons) inseparably united, intimate. অভেদী a. making up discrimination; one who or that which accepts philosophical identity. অভেদ্য a. undetachable, inseparable; impenetrable; impervious; impregnable. অভেদ্যতা n. impenetrability; imperviousness. 155)

(p. 507) durgama difficult of access or approach, not easily passable; inaccessible; impenetrable; difficult to know or cognize or comprehend. 15)

(p. 508) durbhēda, durbhēdya difficult to penetrate or enter or force one's way into; impervious; difficult to raid or conquer; difficult to comprehend. দুর্ভেদ-প্রকোষ্ঠ n. strong room. ̃তা n. impenetrability, imperviousness. 34)