不ふ意いを打うつ

expression, godan verb (-tsu)

take unawares; make a surprise attack

Used for catching someone off guard, either physically or psychologically. Often implies a sudden, unexpected action. Cross-referenced with 不意をつく, which is a more common variant.

See also: 不意をつく

• 敵てきの不ふ意いを打うって、一いっ気きに攻せめ込こんだ。

  We took the enemy by surprise and attacked all at once.