ἀρχαϊσμός
From LSJ
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
English (LSJ)
ὁ,
A old-world charm of style, D.H.Comp.22. 2 use of obsolete expressions, ἀ. οὗτος ῥημάτων Men.11 D., cf. Sch.E.Hipp. 23. 3 ancient custom, περὶ ἀρχαϊσμοῦ, title of work by Manetho, Porph.Abst.2.55.