adṛṣṭāśrutapūrvatva
Yates Sanskrit-English Dictionary
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p. 910, col. 2.
adṛṣṭā_śruta-pūrvatva (tvaṃ) 1. n. Having
never been seen or heard before.
Monier-Williams Sanskrit-English Dictionary (2nd ed.)
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p. 18, col. 3.
adṛṣṭāśrutapūrvatva n. the state of never having been seen or heard before.