寝ね込こみを襲おそう

expression, godan verb (-u)

attack while someone is asleep; make a surprise attack

Fixed expression literally meaning 'attack someone's sleeping state'. Used for both literal attacks on sleeping people and figurative surprise attacks when the target is off guard.

• 敵てきは夜よ中なかに寝ね込こみを襲おそってきた。

  The enemy attacked us while we were asleep in the middle of the night.

• ライバル会社がいしゃが新しん製せい品ひん発はっ表ぴょうの直ちょく前ぜんに寝ね込こみを襲おそうような値ね下さげをした。

  The rival company made a surprise price cut right before our new product launch, catching us off guard.