気きを抜ぬく

expression, godan verb (-ku)

lose focus; let one's mind wander; relax one's attention

Used when someone stops paying careful attention, often leading to a mistake or a drop in performance. Can be used in both negative (warning) and positive (relaxing) contexts.

• 試し験けんの最さい後ごで気きを抜ぬいて、簡かん単たんな問もん題だいを間ま違ちがえた。

  I lost focus at the end of the exam and got an easy question wrong.

• 仕し事ごとが一いち段だん落らくしたので、少すこし気きを抜ぬいてコーヒーを飲のんだ。

  Since work settled down for a bit, I relaxed my attention and had some coffee.