浮うく

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

JMdict entry 1497420 · frequency rank 50. Source and licence.