zest 
/ˈzɛst/ noun
/ˈzɛst/ noun 1 a : lively excitement : a feeling of enjoyment and enthusiasm [noncount] ▪ We'd hoped to recapture some of the zest [=energy] and enthusiasm of youth at the reunion. [singular] ▪ She has a real zest for life. [=she enjoys life very much]
b : a lively quality that increases enjoyment, excitement, or energy [noncount] ▪ His humor added zest to the performance. [singular] ▪ His humor added a certain zest to the performance. 2 [noncount] : small pieces of the skin of a lemon, orange, or lime that are used to flavor food
▪ The recipe calls for a tablespoon of lemon zest. — compare 2peel, rind
b : a lively quality that increases enjoyment, excitement, or energy [noncount] ▪ His humor added zest to the performance. [singular] ▪ His humor added a certain zest to the performance.
▪ The recipe calls for a tablespoon of lemon zest. — compare 2peel, rind
— zest·ful /ˈzɛstfəl/ adjective [more zestful; most zestful]
▪ a zestful performance
/ˈzɛstfəl/ adjective [more zestful; most zestful] ▪ a zestful performance
— zest·ful·ly adverb
