lightheartedness
light·hear·ted·ness
noun
1.
Origin
From lighthearted (adjective) (any sense) + -ness (suffix forming nouns).
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.