Adverb
Verb (する)
Onomatopoeic
1. lightly rolling (of a small and round thing)
2. pleasant, high-pitched sound (e.g. bell, young woman's laughter)
3. changing frequently (e.g. conversation, plans); (occurring) in rapid succession (e.g. sumo wrestlers being defeated); fickly; in a fickle manner
4. roly-poly
5. chirp chirp (sound of insects)
6. ribbit ribbit (sound of frogs); croak croak
7. roller; lint roller; paint roller
when read as "コロコロ, ころころ"