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
[2] Zapfen, obturamentum. – cardo (in der Baukunst). – uva (am Schlunde). – nucamentum (an der Tanne).