equivocal
/ɪˈkwɪvək(ə)l/If you are equivocal, you are deliberately vague in what you say, because you want to avoid speaking the truth or making a decision. 模棱两可的; 含糊其辞的
adjective [原级] 模棱两可的;可疑的
Many were equivocal about the idea. 很多人对此观点都含糊其辞。