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Ὠς χαρίεν ἔστʹ ἄνθρωπος, ὅταν ἄνθρωπος ᾗ → What a fine thing a human is, when truly human!
P. and V. μυριάς, ἡ (Euripides, Bacchae 745), as adj., use P. and V. μυρίοι.