Illustration: At a Japanese home kitchen counter, a child and parent conduct a simple experiment with two identical bottles fitted with balloons. One bottle stands in a bowl of warm water, and its balloon has swollen upright as the warmed air occupies more space.

JLPT N1nounLevel estimated by Bebop

膨ぼう張ちょう

bouchou

expansion, swelling

Example sentences

  1. 多おおくの天文学者てんもんがくしゃは、宇宙うちゅうは永遠えいえんに膨張ぼうちょうしてゆくものだと考かんがえている。

    Many astronomers assume that the universe expands infinitely.

    Tatoeba · CC BY 2.0 FR · Source

  2. 水みずは熱ねつで膨張ぼうちょうする。

    Water expands with heat.

    Tatoeba · CC BY 2.0 FR · Source

  3. 熱ねつはたいていの物ものを膨張ぼうちょうさせる。

    Heat expands most things.

    Tatoeba · CC BY 2.0 FR · Source

Kanji in 膨張

  • 膨swell; get fatOnボウKunふくらむ・ふくれる
  • 張counter for bows & stringed instruments; stretchOnチョウKunはる

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