recondite
英 ['rek(ə)ndaɪt; rɪ'kɒn-]
美['rɛkəndaɪt]
	    - adj. 深奥的;隐藏的;默默无闻的
 
英英释意
- 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"