Jolly (adjective)

1. Feeling or showing cheerful pleasure or delight.
2. Full of or characterized by good humour.
3. Causing or giving pleasure, delight, or happiness.

Origin:

Late 16th century: probably from middle english jolif "merry, joyful", from old french jolif, from jol "festivity", from latin gaudium.

Examples:

1. The children were in a jolly mood, playing and laughing.
2. She had a jolly laugh that filled the room.
3. The party was a jolly affair, with music, dancing, and laughter.
4. He was in a jolly good mood, singing and joking with his friends.
5. The festive decorations put everyone in a jolly spirit.