1. Joyously unrestrained
   - ebullient, exuberant

See also: high-spiritedness, spirited

• Io
• io moth
• IOC
• iodate
• iodic acid
• iodide
• iodin
• iodinate
• iodinated
• iodinated protein
• iodinating
• iodination
• iodine
• iodine-125
• iodine-131
• iodise
• iodised
• iodize
• iodized
• iodoamino acid
• iodochlorhydroxyquin
• iodocompound
• iodoform
• iodoprotein
• iodopsin