expression, godan verb (-ru)
backfire; have a harmful result
Describes a situation where an action intended to be helpful or neutral ends up causing harm or trouble, often unexpectedly. Similar to 仇になる.
See also: 仇になる
親切のつもりが仇となった。
My attempt to be kind backfired.
過保護
Overprotectiveness can sometimes have a harmful effect on a child's development.