to be on the safe side|safe side|side|to イディオム
to be on the safe side|safe side|side|to
adv. phr. To take extra precautions; reduce or eliminate the possibility of a mistake, an error, or even danger. Dad always keeps his valuables in a bank's safe deposit box, just to be on the safe side.
Compare: JUST IN CASE.to be on the safe side|safe side|side|to
adv. phr. To booty added precautions; abate or annihilate the achievability of a mistake, an error, or alike danger. Dad consistently keeps his backing in a bank's safe drop box, aloof to be on the safe side.
Compare: JUST IN CASE. Dictionary