arrears
🇺🇸
/əˈrɪrz/
🇬🇧
/əˈrɪəz/
Money that was supposed to be paid earlier but wasn't.
He finally paid his arrears for the library books he had forgotten to return on time.
彼はついに、時間通りに返却するのを忘れていた図書館の本の滞納金を支払った。