しゅわしゅわbubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)

炭酸(たんさん)水(すい)がシュワシュワしています。

The carbonated water is fizzy. {bubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)}

シャンパンがシュワシュワと泡立(あわだ)っている。

The champagne is bubbling up with a fizzy sound. {bubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)}

二(ふた)つの液体(えきたい)を混(ま)ぜたらシュワシュワと泡立(あわだ)ってきた。

When I mixed the two liquids, they started to bubble up with a fizzy sound. {bubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)}

シュワシュワとした炭酸(たんさん)の入(はい)ったジュースが僕(ぼく)の好物(こうぶつ)です。

A juice with the bubbliness of carbonation is my favorite. {bubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)}

開(あ)けてから数(すう)日(にち)経(た)った炭酸(たんさん)水(すい)はもうシュワシュワしていませんでした。

The carbonated water, a few days after being opened, no longer had its bubbliness. {bubbliness (of a carbonated drink), sound of bubbles (of a carbonated drink), fluffiness (of a cake, souffle or whipped cream)}