ἐπὶ ξυροῦ γὰρ ἀκμῆς ἔχεται ἡμῖν τὰ πρήγματα → our affairs are balanced on a razor's edge, our affairs are set upon the razor's edge
ὀλκίον: и ὅλκιον τό1) сосуд, ваза Men., Polyb., Plut.;2) килевой брус или руль Soph.