τελεοῦσθαι
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)
Greek > English (Woodhouse Verbs Reversed)
(see also τελειόω): come of age, come to manhood, come to perfection