abstruse

英 [?b'stru?s] 美[?b'strus]
  • adj. 深?yuàn)W的；難懂的

英英釋意

1. 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"