"Wert arrears" is not a word, but if we consider "arrears" as the target word, some of its antonyms are "advance," "progress," "prosperity," and "success." The term "arrears" generally relates to unpaid debts or overdue payments, so antonyms usually denote situations where payments are up to date and the debtor is no longer behind on payments. Antonyms such as "advance" and "progress" imply moving forward, usually in a positive way, without any outstanding obligations. On the contrary, "arrears" is a negative word, but antonyms such as "prosperity" and "success" suggest financial abundance or growth, which is the exact opposite of what "arrears" connotes.