1.
cheerfully; in high spirits; humming happily
Describes being in an extremely good mood, often to the point of humming or skipping. Conveys carefree happiness.
るんるん is a playful, somewhat childish expression for being in high spirits. It evokes the image of someone humming a tune while walking.
Common patterns
Usage
This expression is casual and somewhat cute or feminine. It's commonly used in informal speech and manga/anime.
Related Words
Compare:
しょんぼり (dejectedly, sadly, downcast)