n. 25B6; noun
she had a great zest for life : ENTHUSIASM, gusto, relish, appetite, eagerness, keenness, avidity, zeal, fervour, ardour, passion; verve, vigour, liveliness, sparkle, fire, animation, vitality, dynamism, energy, brio, pep, spirit, exuberance, high spirits; informal zing, zip, oomph, vim, pizzazz, get-up-and-go.
he wanted to add some zest to his life : PIQUANCY, tang, flavour, savour, taste, spice, spiciness, relish, bite; excitement, interest, an edge; informal kick, punch, zing, oomph.
the zest of an orange : RIND, peel, skin.
apathy, indifference, blandness.