据柯林斯词典以及新编实用英语词典提供的资料，可进行以下比较：

1. indeterminate 不确定的；不明确的；模糊不清的 If something is indeterminate, you cannot say exactly what it is. 

Dr Amid was a man of indeterminate age. 看不出阿米德博士的具体年龄。

2. ambiguous 更多强调超过二种以上的解释，一词多义；This agreement is very ambiguous and open to various interpretations，强调责任、角色甚至前途的不确定性。

3. vague 强调说话含糊不清、思想混沌，外形模糊 He looked vaguely around the room as he spoke, his mind elsewhere.She had married a charming but rather vague Englishman.