Jocund
/ˈdʒɑːkənd/
Definition 1 of 1
Pro Tip 1/3Archaic Usage
The word 'jocund' is old-fashioned and rarely used in everyday conversation; it's more often found in literature. 
He read the poem aloud, his voice capturing the jocund spirit of its lines.
Pro Tip 2/3Positive Emotion
'Jocund' specifically refers to a cheerful and light-hearted state of mind, often used in happy or festive contexts. 
On her graduation day, she was in a jocund state that was infectious.
Pro Tip 3/3Literary Appeal
Writers may use 'jocund' to give a poetic or classical touch to descriptions of happiness. 
The jocund smiles on every guest's face made the ballroom scenes in the novel come alive.