arrears
noun [ plural ] uk/əˈrɪəz/ us/əˈrɪrz/
应付的欠款;逾期的债款
money that is owed and should already have been paid
rent arrears 逾期未付的租金
Idiom
in arrearsidiom 拖欠
owing money that should have been paid already
My account is badly in arrears. 我账户上的欠款太多了。
They are in arrears on/with their mortgage payments. 他们的按揭贷款逾期未还。
后付（工作一段时间后支付薪水）
If someone is paid in arrears, they are paid at the end of the period of time during which the money was earned.
I'm paid a week in arrears. 我每周末领薪水。