Vocabulary What does 水泡 (すいほう, suihou) mean? 水泡 (すいほう, suihou) means foam; bubble. Quick factsReadingすいほうRomajisuihouPart of speechnoun 水泡すいほうsuihoufoam; bubble1noun foam; bubble2noun nothingAlso written: 水沫Kanji in this word水water泡foam, bubble