verbündet

From LSJ

ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)

Source

German > Latin

verbündet, foederatus. foedere iunctus. – foedere sociatus. socius (als Bundesgenosse).