restive
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
adj.
P. and V. ὑβριστής, V. ἄστομος. Be restive: P. and V. σκιρτᾶν (Plat.). Intractable: Ar. and P. χαλεπός; see intractable.