沸々(ふつふつ)simmer, bubble out, flow out

蒸(む)し暑(あつ)いせいで汗(あせ)が沸(にえ)々と出(で)てきます。

Due to the humid heat, sweat begins to flow out like bubbles simmering. {simmer, bubble out, flow out}

鍋(なべ)の中(なか)でお湯(ゆ)が沸(にえ)々と煮(に)えたぎっています。

The water in the pot is simmering and bubbling vigorously. {simmer, bubble out, flow out}

見(み)て！岩(いわ)と岩(いわ)の間(ま)から清水(しみず)が沸(にえ)々と湧(わ)き出(で)ているよ！

Look! Clear water is bubbling out from between the rocks! {simmer, bubble out, flow out}

闘志(とうし)が沸(にえ)々と湧(わ)いてきて、じっとしてはいられなくなりました。

My fighting spirit began to bubble out intensely, making it impossible for me to remain still. {simmer, bubble out, flow out}

同格(どうかく)発表(はっぴょう)の看板(かんばん)に自分(じぶん)の受験(じゅけん)番号(ばんごう)を見(み)つけ、喜(よろこ)びが沸(にえ)々と湧(わ)いてきました。

Upon finding my examination number on the announcement board, joy started to simmer and bubble out within me. {simmer, bubble out, flow out}