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Ὁ δ' ἀνεξέταστος βίος οὐ βιωτὸς ἀνθρώπῳ → The unexamined life is not worth living
P. and V. ἄφωνος, V. ἄφθογγος, ἄφθεγκτος, ἄναυδος, ἀφώνητος, ἀπόφθεγκτος; see also silent.