συμβάλλειν
From LSJ
Καλὸν τὸ μηδὲν εἰς φίλους ἁμαρτάνειν → Nihil peccare in amicos est pulcherrimum → Gut ist, sich gegen Freunde nicht versündigen
Greek > English (Woodhouse Verbs Reversed)
(see also συμβάλλω): attack, conjecture, close with, deduce, engage, explain, guess, infer, match, meet, bring into conflict, clash together, close of another, come to blows, do business with, encounter in battle, join battle, make known, make to clash, meet in battle, of combatants, set side by side, shut the eyes, transact business with