- Difficult to understand - Esoteric - Stubs are complicated and hard to understand - Concealed or hidden out of the way. - Remote from apprehension; difficult to be comprehended or
understood; recondite; as, abstruse learning.
- Baffling person - Conundrum - Difficult problem - Disrupted game in mystery - Head-scratching mystery resolved in-game - Mysterious person or thing - Mystery