noun
boomerang effect
In social psychology and communication, the phenomenon where a persuasive message produces the opposite of the intended effect, strengthening the audience's original attitude.
強い説得がブーメラン効果を生むことがある。
Strong persuasion can sometimes produce a boomerang effect.
この広告はブーメラン効果で逆効果
This advertisement backfired due to the boomerang effect.