十じゅう倍ばいじゅうばいMeanings1nounten times; tenfoldIndicates a quantity or degree multiplied by ten. Used as a noun or adverbially with に.この箱はこはあの箱はこの十じゅう倍ばいの重おもさだ。This box is ten times as heavy as that one.人じん口こうが十じゅう年ねんで十じゅう倍ばいになった。The population increased tenfold in ten years.