ㄕㄡˇshǒuㄨㄤˋwàngㄒㄧㄤxiāngㄓㄨˋzhù

  1. 相互幫助共同守衛瞭望漢書·二四·食貨志》:出入守望相助疾病相救是以和睦。」同舟共濟不相為謀以鄰為壑

to keep watch and defend one another (idiom, from Mencius)​; to join forces to defend against external aggressors, mutual help and protection
Wache halten und einander helfen (V)​