intellectual

n. 有知识者,知识份子,凭理智做事者
a. 智力的,知性的,聪明的

The argument was too intellectual for me; I couldn't follow a word of it.

这场争论对我来说太深奥了，我一点都搞不明白。

These views were common among intellectuals.

这些观点在知识分子中很普遍。