水泡 (すいほう, suihou) Japanese meaning: foam | KotomoraFoam was floating on the river current.
Expressions
水泡に帰すcome to nothing; end in failure; be in vain 水泡に帰するcome to nothing; go down the drain; go up in smoke
Rare variant kanji; 沫 also means 'bubble' or 'foam' but is much less common than 泡.
みなわ
Rare native Japanese reading; mainly found in classical or literary contexts.