recondite

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If nothing else, having a few recondite words at your disposal can be a great defense against the pedantry of others.
假如无太多影响，在你的表达中使用一些深奥的词语对于其他人的卖弄学问可是一种很好的防卫。
People often assume that data are simple, graspable and trustworthy, whereas theory is complex, recondite and slippery, and so give the former priority.
人们常假设数据是简单的、可理解的、和可信的；而理论则是复杂、深奥、和难解的，因而会给予数据较优先的考虑。
But their juxtaposition provides even the hardened student with some new perspectives, and there are useful if brief looks at more recondite questions such as Israel's relations with the Gulf states.
但当它们同时呈现在我们面前时，即使是最固执己见的研究者也会获得一些新的视角；此外此书对更为深奥的问题如以色列和海湾各国的关系虽然只是惊鸿一瞥，但同样颇有助益。

Monetary policy is the most recondite yet most pervasive and powerful of economic forces.
FORBES: Fiat Money: The Root Cause Of Our Financial Disaster
For example, several people make the point that even the most complicated and recondite ideas have some easy-to-express core.
FORBES: A Beautiful Sausage
But their juxtaposition provides even the hardened student with some new perspectives, and there are useful if brief looks at more recondite questions such as Israel's relations with the Gulf states.
ECONOMIST: Israel and Palestine without peace

Recondite areas of knowledge or learning are difficult to understand, and not many people know about them.