/ zest; NAmE / noun
1.
[ sing. , U ] zest (for sth) enjoyment and enthusiasm
SYN appetite :
He had a great zest for life .
2.
[ U , sing. ] the quality of being exciting, interesting and enjoyable :
The slight risk added zest to the experience.
3.
[ U ] the outer skin of an orange, a lemon, etc., when it is used to give flavour in cooking
—compare peel , rind , skin
► zest·ful / -fl; NAmE / adjective
► zesty /ˈzesti/ adjective
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WORD ORIGIN
late 15th cent.: from French zeste orange or lemon peel, of unknown origin.