Quadruple
"Quadruple" in Japanese
四倍
(being four times as long, as big or as many of something)
四重
(being four times as long, as big or as many of something)
四倍する
yombai suru
(to multiply by four)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.