This certainty of the morrow gave zest and enthusiasm to life, and the County people enjoyed life with a heartiness that Ellen could never understand.
He still had the Gallic twinkle in his black eyes and the Creole zest for living but, for all his easy laughter, there was something hard about his face which had not been there in the early days of the war.
So much of the keen zest had gone out of life recently.
There are no more uses of "zest" in the book.
Show samples from other sources
If you didn’t know her, you’d think her zest comes from malice.
Susan Ee -- Angelfall
Kit chose the stories she herself enjoyed most, and her reading had a zest and liveliness that enthralled the children.
Elizabeth George Speare -- The Witch of Blackbird Pond