おろそかにする

expression, suru verb (irregular)

neglect; ignore; disregard; make light of

Used when someone fails to give proper attention or care to something they should value, often with a nuance of treating it as unimportant.

• 彼かれは仕し事ごとをおろそかにして、遊あそんでばかりいる。

  He neglects his work and just plays around.

• 健けん康こうをおろそかにすると、後あとで後こう悔かいするよ。

  If you neglect your health, you'll regret it later.