dubious [ˈdju:biəs]

以下由轻松背单词网站提供

adj.怀疑的，无把握的；有问题的，靠不住的

thought not to be completely true or not able to be trusted

What he said yesterday was dubious. 他昨天说的话很含糊。
He uses some dubious shifts to get money. 他用一些可疑的手段去赚钱。