a rasor , (Homer), etc.:—;proverb, ἐπὶ ξυροῦ ἵσταται ἀκμῆς ὄλεθρος ἠὲ βιῶναι death or life is balanced on a rasor's edge, (Iliad by Homer); ἐπὶ ξυροῦ τῆς ἀκμῆς ἔχεται ἡμῖν τὰ πράγματα (Herdotus Historicus); βεβὼς ἐπὶ ξυρῷ τύχης (Sophocles Tragicus) (ML)