Adverb
Verb (する)
Onomatopoeic
1. rumbling (of thunder, one's stomach, etc.); grumbling; growling; purring
2. rolling (of something large and heavy); tumbling
3. all over the place; everywhere; commonly; in great numbers
4. idly; lazily; slothfully
5. (uncomfortable feeling of) having a foreign substance in one's eye, stomach, etc.
Noun
Children's language
Onomatopoeic
6. thunder