1、Latin surdus "deaf, unheard, silent, mute". => surd-: deaf, unheard, silent, mute.
2、surd- => surd: irrational.
3、咱们汉语里有表达这种关联的形象的成语：掩耳盗铃、装聋作哑、充耳不闻；这些行为是不是都非常的荒唐、荒谬、无理取闹啊！因此，由词根含义转变到、引申到单词含义自然就水到渠成了。
4、ab- "away, off; 由于该前缀的这层含义，在这里添加在surd之前更加强了surd的含义，为什么呢？想一想充耳不闻、装聋作哑地走开(away, off)，就明白了！" + surd- / surd => absurd.
5、In surd, the mathematical sense is from the use of Latin surdus to translate Arabic (jadhr) asamm "deaf (root)," itself a loan-translation of Greek alogos, literally "speechless, without reason".
6、In French, sourd remains the principal word for "deaf".

absurd 荒谬的

前缀ab-,此处用于强调义。词根sur, 模糊不清的说话，拟声词，见susurration,沙沙声，杂音。此处词义由杂音扩大为听不清，听不懂，荒谬。

1. It is absurd to be discussing compulsory redundancy policies for teachers.

讨论针对教师的强制裁员政策真是滑稽可笑。

2. It can be done without following some absurd, off-the-wall investment strategy.

不用遵照那套荒唐愚蠢的投资策略也可以做到。

3. This is patently absurd.

这显然荒唐透顶。

4. Parkinson had a sharp eye for the absurd.

帕金森对于荒诞不经的事一眼即明。

5. That's absurd.

那非常荒谬。