certitude

certitude
[ˈsəːtɪtjuːd]
noun
  1. [mass noun]absolute certainty or conviction that something is the case
    确信,确定无疑
    the question may never be answered with certitude.
    这个问题从未被确定无疑地回答过。
    ■[count noun]something that someone firmly believes is true
    深信不疑的事,确定的事
语源
  1. late Middle English: from late Latin certitudo, from certus 'certain'
英语宝典
考试词汇表