adjective
jocund
JAH-kund/ˈdʒɑːkənd/
Cheerful and lighthearted.
Her jocund laugh brings a little warmth to the room.

Etymology
The Latin adjective meant pleasant or agreeable, with an earlier sense of helpful. The English meaning shifts the emphasis from giving pleasure to showing a cheerful, lighthearted disposition.
In context
Night's candles are burnt out, and jocund day stands tiptoe on the misty mountaintops.
More examples
- He remains jocund even when rain interrupts the picnic.
- The reunion is a jocund affair, full of laughter.
- She greets us with a jocund smile.
Forms
jocund
jocundity noun — The quality of being cheerful and lighthearted.