IPA: /ˈlaɪtnəs/
KK: /ˈlaɪtnəs/
The quality of being light in weight or feeling, often associated with ease, cheerfulness, or a lack of seriousness.
The dancer moved with such lightness that it seemed as if she was floating on air.
Lightness → It is formed from "light" (from Old English "leoht", meaning not heavy or bright) and "-ness" (meaning the state or quality of). The word "lightness" refers to the quality of being not heavy or the state of being light.
Think of the word 'light' meaning not heavy, and remember that 'lightness' describes the state of being not heavy.