Dictionary/水爆すいばくSuibaku水爆 (Suibaku) is a Japanese noun meaning “hydrogen bomb”.Meaningsnoun, adjectival nounhydrogen bombKanji in 水爆水water爆bombRelated words水water (esp. cool or cold)爆弾bomb爆発explosion爆破destructive blast水口spout水田(water-filled) paddy field水着bathing suit水族館aquarium (building)香水perfume西瓜watermelon (Citrullus lanatus)水曜日Wednesday水分water