膨張
ぼうちょう
bouchou
nounVocabularyExtra vocab 8 — supplementary

Quick answer

膨張 (ぼうちょう (bouchou)) means "Expansion". The reading is ぼうちょう (bouchou). Audio pronunciation and kanji breakdown are below.

Meaning

Expansion

Also : Swelling · Growth

Learn 膨張 with SRS

Free to start — no credit card. Track every review with spaced repetition.

Start free

Example Sentences

風船が膨張した。

ふうせんがぼうちょうした。

The balloon expanded.

Kanji in this word

膨
Swell
Kunふく.らむ、ふく.れる
Onぼう
JLPT N1
張
Spread
Kunは.る、は.り、ば.り
Onちょう
JLPT N1

Last updated Jul 22, 2026

Learn 膨張 with Spaced Repetition

InitialJ uses scientifically proven SRS to help you memorize kanji and vocabulary for the JLPT. N5 is free forever; no credit card required.

Start Free — JLPT N5Browse Dictionary