The Chinese idiom 同仇敌忾 is formed by combining the two-character phrases 同仇 ("shared hatred") and 敌忾 ("anger against the enemy"), where 同 means "together", 仇 means "hatred", 敌 means "enemy", and 忾 means "indignation"; these elements unite to literally express collective hatred and rage directed at a common adversary, derived from classical sources like the "Book of Songs" and "Zuo Zhuan".