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
adj.
Brittle: P. κραῦρος (Plat.). Weak: P. and V. ἀσθενής.