defective
adj. 有问题的，有缺陷的；（词）不完全变化的
n. 有缺陷的人
复数 defectives
比较级 more defective
最高级 most defective
例句
Retailers can return defective merchandise.
零售商可以退回有瑕疵的商品。
《柯林斯英汉双解大词典》
Her hearing was found to be slightly defective.
经检查，她的听力有点缺陷。
《牛津词典》
A manufacturer negligently made and marketed a car with defective brakes.
一家制造商渎职，制造并销售了一款有制动缺陷的汽车。
