かたきどうし· also てきどうし
mutual enemies
Also written 敵同士
Noun
お互たがい仇同士かたきどうしだ。
They are bitter enemies.
敵同士かたきどうしが面めんと向むかい合あった。
The enemies stood face to face.
別べつにいがみ合あってる敵同士かたきどうしでもあるまいし。
It's not as though we were enemies at each other's throat.