also: うきぎ
noun
driftwood; floating timber
Wood that has been washed onto shore or is floating in water.
海岸にたくさんの浮木が打ち上げられていた。
A lot of driftwood had washed up on the shore.
Compound of 浮 (fu, 'floating') and 木 (boku, 'wood'). The reading うきぎ is a native Japanese reading of the same characters.