Long Life
Longevity
noun, の adjective
A long lifespan is a long life.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
婆ちゃんにいつも、「バナナを食べることは長寿に繋がる」と言われるんだよね。
My grandmother always tells me that eating bananas leads to a long life.