来月は、損失を取り返さねばならない。

、。

Next month, we have to make up for the losses.

Literal

Next-month [topic-は], loss [object-を] recover-must.

取り返す ('recover / get back / regain') is a compound verb: 取る ('take') + 返す ('return') = 'take back.' Used for recovering losses, reputation, or time. ねばならない is a formal/written variant of ~なければならない — more literary and weighty. Business-register.