Fetching details from the dictionary...
falling together; mutual destruction; joint bankruptcy
両社は共倒れの危機に瀕した。
Both companies faced the risk of mutual ruin.
争いを続ければ共倒れになる。
If the conflict continues, both sides will fall.
共倒れを避けるため妥協が必要だ。
Compromise is necessary to avoid mutual destruction.