arrear

noun | \ ə-ˈrir \ | ar·rear

1. a : the condition of being behind in one's duties or especially financial obligations —usually used in pl. in arrears with the rent

   b : the condition of being due at the end of a term rather than the beginning —usually used in pl. mortgage payments are made in arrears

2. : an unpaid and overdue debt —usually used in pl. paying off the arrears of the previous owners