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.
彼は仕事をおろそかにして、遊んでばかりいる。
He neglects his work and just plays around.
健康をおろそかにすると、後で後悔するよ。
If you neglect your health, you'll regret it later.