油ゆ断だんなく

adverb

alertly; vigilantly; without letting one's guard down

Adverbial form of 油断 (carelessness, negligence) with なく, meaning 'without being careless'. Used to describe acting with constant attention and caution.

• 彼かれは油ゆ断だんなく周しゅう囲いを見み張はっていた。

  He was vigilantly watching his surroundings.

• 油ゆ断だんなく準じゅん備びを進すすめることが大たい切せつだ。

  It is important to proceed with preparations without letting your guard down.