rec·on·dite
adjective/ˈrekəndaɪt/
/ˈrekəndaɪt/
(formal)- not known about or understood by many people
深奥的；晦涩的 - a recondite subject
一门深奥的学科
Word Originmid 17th cent.: from Latin reconditus ‘hidden, put away’, past participle of recondere, from re- ‘back’ + condere ‘put together, secrete’. - a recondite subject