questionable
adj. 可疑的；不确定的，有问题的；可能不诚实(或不道德)的，别有用心的
比较级 more questionable
最高级 most questionable
例句
He has been dogged by allegations of questionable business practices.
他一直被有可疑商业行为的传言困扰着。
《柯林斯英汉双解大词典》
Her motives for helping are questionable.
她帮忙的动机令人生疑。
《牛津词典》
His best friend died under questionable circumstances.
他最好的朋友在不明的情况下死了。
