The compound word **永世** (yǒngshì) is formed by combining two characters, each with its own semantic contribution: **永** means "perpetual" or "forever," conveying a sense of endless duration, while **世** means "generation," "lifetime," or "age," denoting a worldly or temporal span. Together, they create a binome where the meaning of **永** amplifies and eternalizes the concept of **世**, resulting in the figurative meaning of "for all eternity," "forever," or "throughout all ages," thus describing a time span that transcends ordinary human lifetimes or historical epochs.