-ku Godan/u-verb

1. to float
2. to become merry; to be cheerful
3. to become loose; to become unsteady
4. colloquial to feel out of it; to be cut off (e.g. from those around you); to feel out of place
5. to be frivolous; to be uncertain
6. to have (time, money, etc.) left over; to be saved (e.g. money)
7. to have no basis; to be unreliable