1. momentous的反义词

1. 重大的：22) momentary 瞬时的, 短时的 | momentous 重大的 | 23) memorable 值得记忆的, 不能忘却的

2. 重大,极重要的：momentary 刹那,瞬息的 | momentous 重大,极重要的 | momentum 运动量,动力

3. momentous

3. 重要的：1. The momentous thing in human life is the art of winning the soul to good or evil.人生中最重要的... | Momentous: 重要的 | 2. Reading maketh a full man; conference a ready man; and writing an exact man...

4. 重大的,重要的：momentary 片刻的,瞬间的 | momentous 重大的,重要的 | monotonous 单调的,枯燥乏味的

1. 重大的;关键的;有影响的
    If you refer to a decision, event, or change as momentous, you mean that it is very important, often because of the effects that it will have in the future.

    e.g. ...the momentous decision to send in the troops...
           派遣部队的重大决定
    e.g. The past three years have been among the most momentous in world history.
           过去的3年是世界历史上最重要的时期之一。

1. of very great significance

    e.g. deciding to drop the atom bomb was a very big decision
           a momentous event