揺蕩う

たゆたう, たゆとうtayutau

godan verb · intransitive · Godan verb with 'u' ending (special class)

1. to sway to and fro
2. to drift about
3. to flutter
4. to flicker
5. to be fickle
6. to be irresolute
7. to vacillate
8. to waver

Study it in Yanamino