paying double; paying N times as much
Used as a noun meaning double payment, or as a suffix after a number to indicate paying that many times the usual amount. Common in contexts like bonuses, settlements, or penalties.
The year-end bonus was double pay.
A triple allowance was paid as a special bonus.
Compound of 倍 (bai, 'double, times') and 付け (tsuke, 'attaching, adding'), referring to attaching a multiplied rate to a payment.