을 대비해서

in case of; in preparation for

→ 을
phrase Rare #26,857
in case of; in preparation for Used after a noun referring to a possible event or situation to describe preparing for it. The noun ending in a consonant takes 을 대비해서; nouns ending in a vowel take 를 대비해서.
KO: 사고를 대비해서 비상 연락처를 적어 뒀어요.
EN: I wrote down emergency contact information in case of an accident.

사고 소식 듣고 만약을 대비해서 복사해 뒀어요

After hearing about the accident, I made a copy just in case.

— 세 가지 색: 블루 (1993)