μεσοῦν
From LSJ
Βέβαιον οὐδέν ἐστιν ἐν θνητῷ βίῳ → Nihil, ut videtur, proprium in vita datur → Nichts Festes gibt's im Leben eines Sterblichen
Greek > English (Woodhouse Verbs Reversed)
(see also: μεσόω) be at the middle
Lexicon Thucydideum
esse in medio, to be between, 5.20.2, 5.57.1, 6.30.1.