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
fulmenta: ae, f. contr. from fulcimenta, from fulcio (ante-class.),
I a prop, support of a building, Cato, R. R. 14, 1.—
II In partic., the heel of a shoe, Lucil. ap. Non. 206, 26; Plaut. Trin. 3, 2, 94.