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
from עָרַר; naked, i.e. (figuratively) poor: destitute. See also עֲרוֹעֵר.