This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

膨張

膨脹、 ぼう張

Reading

Kana: ぼうちょう
Romaji: bouchō
Kana
Romaji

Definition

vs
1

expansion; swelling; increase; growth

Kanji

Readings: ボウ、 ふく.らむ、 ふく.れる
Meanings: swell, get fat, thick
Readings: チョウ、 は.る、 -は.り、 -ば.り
Meanings: lengthen, counter for bows & stringed instruments, stretch, spread, put up (tent)
Readings: チョウ、 は.れる、 ふく.らむ、 ふく.れる
Meanings: dilate, distend, bulge, fill out, swell

Example Sentences

(みず)(ねつ)膨張(ぼうちょう)する。
➥Water expands with heat.
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(ねつ)はたいていの(もの)膨張(ぼうちょう)させる。
➥Heat expands most things.
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(おお)くの天文学者(てんもんがくしゃ)は、宇宙(うちゅう)永遠(えいえん)膨張(ぼうちょう)(つづ)けると(おも)っている。
➥Many astronomers assume that the universe continues to expand forever.
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宇宙(うちゅう)無限(むげん)膨張(ぼうちょう)(つづ)けるのか?
➥Will the universe expand indefinitely?
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世界(せかい)人口(じんこう)は1(ねん)に9(せん)(まん)(にん)割合(わりあい)膨張(ぼうちょう)している。
➥The world population is expanding at the rate of nearly 90 million people a year.
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(おお)くの天文学者(てんもんがくしゃ)は、宇宙(うちゅう)永遠(えいえん)膨張(ぼうちょう)してゆくものだと(かんが)えている。
➥Many astronomers assume that the universe expands infinitely.
Full Entry➤
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