ἡμερόβιος
From LSJ
τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)
English (LSJ)
ον,
A living for a day: τὸ ἡ.,= τὸ ἐφήμερον, an insect, esp. may-fly, Thphr.Metaph.29, Plin.HN11.120; of Diogenes, living from hand to mouth, Satyr. ap. Porph.Abst.p.270 N.