The word 誓死 is formed by combining the character 誓, meaning "to vow" or "to swear", with the character 死, meaning "to die" or "death". In this compound, 誓 acts as a verb indicating the action of making a pledge, while 死 serves as the object of that vow, literally conveying "to vow death". Together, they create a verb meaning to swear unwavering commitment, even at the cost of one's life, emphasizing extreme determination.