What does it really mean to be jubilant? In this holiday episode of One Word, we explore why joy so often becomes louder, brighter, and more communal at this time of year. From ancient winter festivals and global traditions to the science behind sound, generosity, and visual joy, jubilant reveals itself as more than simple happiness. Along the way, we wander into unexpected territory,  why certain shapes feel joyful before we can explain them, what in the world the Kiki/Bouba effect is, and that lemons aren’t actually a natural thing. Blending etymology, history, psychology, and culture, this episode asks a timeless question: why does joy, especially in winter, insist on being shared?