on the safe side
US /ɑn ðə seɪf saɪd/
UK /ɑn ðə seɪf saɪd/

1.
만약을 대비해서, 안전하게
to take precautions to avoid risk or danger
:
•
I'll bring an umbrella, just on the safe side, even though it's sunny.
햇볕이 쨍쨍해도 만약을 대비해서 우산을 가져갈게.
•
It's better to arrive early, just on the safe side, to avoid traffic.
교통 체증을 피하려면 안전하게 일찍 도착하는 게 좋아.