ambiguous

I think he fills his speeches with ambiguous words on purpose to avoid making promises.

(Chinese) 我认为他在演讲中故意使用模棱两可的词，是为了避免做出承诺。

The ending of the movie was ambiguous, leaving the audience to decide the hero's fate.

(Chinese) 电影的结局是开放式的，留给观众去决定英雄的命运。