not known about by many people and difficult to understand (Cambridge)
not known about or understood by many people (Oxford)
We had to work from material that was both complex and recondite.
The ascription to him of a work on so recondite a legal issue does therefore require some justification.
a recondite subject
Abstruse
Obscure
Straightforward
Simple
Abashed
Unabashed
Unabashedly