Zest

n.	1.
	1.	A piece of orange or lemon peel, or the aromatic oil which may be squeezed from such peel, used to give flavor to liquor, etc.
	2.	Hence, something that gives or enhances a pleasant taste, or the taste itself; an appetizer; also, keen enjoyment; relish; gusto. Almighty Vanity! to thee they owe Their zest of pleasure, and their balm of woe. - Young. Liberality of disposition and conduct gives the highest zest and relish to social intercourse. - Gogan.
	3.	The woody, thick skin inclosing the kernel of a walnut.
v. t.	1.	To cut into thin slips, as the peel of an orange, lemon, etc.; to squeeze, as peel, over the surface of anything.
	2.	To give a relish or flavor to; to heighten the taste or relish of; as, to zest wine.

Noun	1.	zest - vigorous and enthusiastic enjoyment Synonyms: gusto, relish, zestfulness
	2.	zest - a tart spiciness Synonyms: piquance, piquancy, tanginess, tang, nip
Verb	1.	zest - add herbs or spices to Synonyms: spice up, spice

ZEST - An object-oriented extension of Z. ["Object Orientation in Z", S. Stepney et al eds, Springer 1992].

activity, alacrity, amusement, animal pleasure, animal spirits, animation, anxiety, anxiousness, appetite, ardor, avidity, avidness, bite, bliss, bodily pleasure, breathless impatience, brio, briskness, capersomeness, carnal delight, cheerful readiness, coltishness, comfort, content, contentment, coziness, creature comforts, delectation, ease, ecstasy, edge, elan, elation, endpleasure, entertainment, enthusiasm, esprit, euphoria, exuberance, fervor, flavor, forepleasure, forwardness, friskiness, frolicsomeness, fruition, fun, gaiety, gamesomeness, gayness, ginger, glow, gratification, great satisfaction, gust, guts, heart, heartiness, hearty enjoyment, hotness, hunger, impatience, impetuosity, impetus, intellectual pleasure, interest, joie de vivre, keen desire, keen pleasure, keenness, kick, kicks, life, liveliness, lustiness, luxury, mettle, nip, nippiness, palate, passion, pepper, pepperiness, perkiness, pertness, physical pleasure, piquancy, piss and vinegar, playfulness, promptness, punch, pungency, quickness, quiet pleasure, raciness, readiness, robustness, rollicksomeness, rompishness, self-gratification, self-indulgence, sensual pleasure, sensuous pleasure, sexual pleasure, skittishness, snap, snappiness, spiciness, spirit, spiritedness, spirits, sportiveness, sprightliness, sweetness of life, tanginess, thirst, titillation, verve, vigor, vim, vitality, vivacity, voluptuousness, warmth, well-being, zeal, zestfulness, zing, zip