difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge;
\\\"the professor\\\'s lectures were so abstruse that students tended to avoid them\\\"
\\\"a deep metaphysical theory\\\"
\\\"some recondite problem in historiography\\\"
造句
用作形容詞(adj.)
Philosophical semantics is too abstruse to understand. 哲學語義學深奧難懂。
Einstein\\\'s theory of relativity is very abstruse. 愛因斯坦的相對論非常難懂。