ὁμονοεῖν

From LSJ

μέγα πνεῦμα καὶ πολλὴν θάλασσαν → strong wind and high waves

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ὁμονοέω): agree in opinion, agree together, be in harmony, be unanimous, hold same views

Lexicon Thucydideum

in concordia vivere, to live in harmony, 8.75.2.