ㆍ 역효과를 내다[가져오다 / 초래하다] have the opposite[reverse / adverse] effect[result] to what was intended / bring about a contrary[boomerang] effect / produce a contrary result / defeat its own end[purpose]
ㆍ 엄격한 제한이 역효과를 냈다 {The effect of the strict controls was contrary to what was expected}