carried over from last month; left unpaid from previous month
Used especially for bills, payments, or tasks that remain unsettled and are carried into the current month.
Last month's rent has been left unpaid.
I have to quickly clear up the work carried over from last month.
Compound of 月 (tsuki, 'month') and 越し (goshi, from 越す kosu, 'to pass over'). Literally 'passing over the month', referring to something that remains from the previous month.