Cheerfulness, high spirits, joy, mirth; freedom from sadness or worry. In later use also: breeziness, liveliness. Frequently in lightness of heart…

The quality of being jaunty; self-satisfied sprightliness; airiness; perkiness.

Light-heartedness; playfulness.

lit. without care or concern; as n., unconcern; also, †a free-and-easy social gathering.

The state of being a boy; the time of life during which one is a boy. Also figurative: the early period of something.

unconcern.

The condition of being breezy; also figurative.

The fact or quality of being light-hearted and carefree. Obsolete. rare.

the state or quality of being carefree.

viscerotonic personality or characteristics.