expression, godan verb (-su)
repay double; pay back twice the amount
Used when returning a favor, loan, or harm with twice the original value or intensity. Often implies a strong sense of reciprocity.
借りたお金は倍にして返すと約束した。
He promised to repay the borrowed money double.
受けた恩は必ず倍にし
I intend to repay the kindness I received twofold.
expression, godan verb (-su)
repay x times the amount
Pattern where 倍 is replaced by a number (e.g., 三倍にして返す) to indicate repaying a multiple of the original amount. The note 'following a number x' indicates this productive use.
彼は借金を三倍にして返すと言った。
He said he would repay the debt threefold.