倍ばいする

suru verb (special), intransitive verb

double; become twice as much

Intransitive use: the subject itself becomes twice the original amount or size. Often used with numbers, amounts, or abstract qualities.

• 売うり上あげが去きょ年ねんの倍ばいに倍ばいした。

  Sales doubled compared to last year.

suru verb (special), intransitive verb

increase; grow

Intransitive use for a general increase, not necessarily exactly doubling. Less common than sense 1; often replaced by 増える or 増加する in modern Japanese.

• 人じん口こうが倍ばいする一いっ方ぽうで、資し源げんは限かぎられている。

  While the population increases, resources are limited.