矢忠不二

Explanation: Swore loyalty in the end will never change. 　　Usage: Partial official; as predicate, attributive; for people 　　Source: Wu Ying-Kui Qing, "the book Zhong Ximing": "concubine return today, King and chastity, vector refuses to two, king fruit has a soul, when to drink this." 　　Examples: Their friendship ~ Thesaurus:  Take an oath to Inalienable, back and side, swear to be loyal forever, Unshaken, Dare to die Not II