zest

The outer skin of a citrus fruit, used as a flavouring or garnish.

“The orange zest gives the strong flavor in this dish.”

General vibrance of flavour.

“I add zest to the meat by rubbing it with a spice mixture before grilling.”

(by extension) Enthusiasm; keen enjoyment; relish; gusto.

The woody, thick skin enclosing the kernel of a walnut.

To scrape the zest from a fruit.

To make more zesty.