Which term is used to describe playing "lightly and delicately"?

The term "leggiero" is used to describe a style of playing that is light, delicate, and nimble. In music, it suggests a smooth and effortless touch that is often characterized by a quick tempo and a graceful feel. This concept is particularly relevant when a composer wants the performer to bring a sense of lightness to the music, allowing certain passages to sound airy and less weighty.

In contrast, "legato" refers to playing in a smooth, connected manner where notes are tied together without perceptible breaks, while "marcato" indicates a strong, marked emphasis on specific notes. "Largo," on the other hand, is a tempo marking meaning "slow," which does not connote lightness but rather a broad, stretched-out style. Thus, leggiero is the most appropriate term for describing a light and delicate touch in performance.