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
ἰσχυρικός, -ή, -όν (Α) ισχυρόςεπίμονος, τραχύς.