Long-lived means living or existing for a long time. People and animals can be long-lived (they tend to live many years). Plants, companies, TV shows, and traditions can be long-lived too: they stay in the world for a long stretch. For a person it is close to “they live a long life,” but as an adjective it often describes a type: a long-lived family, a long-lived species. It comes from life, not from the everyday verb live, though the two are cousins. You will hear two pronunciations for the second half: like lived in “I lived here,” or like life + d. Both are used; the life one matches how the word was built. It overlaps with long-lasting, though actually long-lived leans toward “how many years this life or this thing has had,” and long-lasting leans toward “it does not wear out.”