Joie de vivre \zhwaduh VEE-vruh\ noun
1. French. a delight in being alive; keen, carefree enjoyment of living.
It’s this sort of thing that ages a chappie, don’t you know, and makes his youthful joie-de-vivre go a bit groggy at the knees.
— P. G. Wodehouse, The Inimitable Jeeves, 1923
Joie de vivre translates literally from French as “joy of living.” It entered English in the late 1800s.