counterproductive
adjective uk/ˌkaʊn.tə.prəˈdʌk.tɪv/ us/ˌkaʊn.t̬ɚ.prəˈdʌk.tɪv/
产生相反效果的；产生相反作用的；事与愿违的，适得其反的
having an effect that is opposite to the one intended or wanted
Improved safety measures in cars can be counterproductive as they encourage people to drive faster. 提高车辆安全性的措施可能会适得其反，因为这会激励人们开快车。