ἐξανθεῖν
From LSJ
ὡς μήτε τὰ γενόμενα ἐξ ἀνθρώπων τῷ χρόνῳ ἐξίτηλα γένηται → in order that so the memory of the past may not be blotted out from among men by time
Greek > English (Woodhouse Verbs Reversed)
(see also ἐξανθέω): blossom out into, burst forth into foam, burst into froth, come to a head, foam forth, put forth flowers
Lexicon Thucydideum
efflorescere, to bloom, flourish, 2.49.5.