gusto

This term describes a spirited, hearty approach to an activity, often involving a visible or audible display of zest. It suggests a lack of inhibition and a full-bodied commitment to the pleasure of the moment, whether in eating, performing, or working. As an uncountable noun, it does not have a plural form and cannot be quantified with numbers. To express a specific amount of this quality, one must use partitive constructions such as a great deal of gusto or a touch of gusto.