recondite

But I hope this new Messenger from Heauen doth bring happie tidings of some munificent and liberall Patron to these rauishing (but impouerishing) studies, by whose gracious bountie the most recondite mysteries of this abstruse and diuine science [astronomy] shall at length be manifested.

[T]here was in the man much learning, and that of the more inward & recondit, a great Antiquary, and one that had a certain large poſſeſſion of Divine and Humane Lawes.

It is delightful to see this recondite scholar [Thomas Browne]—this contemplative and refining dreamer—in the centre of his happy nor unworthy household.

They afford a lesson to the modern metaphysical and recondite writers not to overvalue their works.

Recondite, (aculeus) concealed within the abdomen, seldom exposed to view.

Animals of this class are so recondite in their habits... so little known to naturalists beyond the more common species.