abstruse

Difficult to comprehend or understand; obscure.

Some time the good makithe an ile end⸝ ãd the ile a godd. In this opiniõ⸝ and in ſcrutable miſterie be werithe all his wittes⸝ and at the end of his cogitacions⸝ fyndithe more abſtruſe⸝ and doutfull obiections thẽ at the beginning⸝ […]

Be leſs abſtruſe, my riddling days are paſt.

Concealed or hidden; secret.

O vvho is he that could carrie nevves to our olde father, that thou vvert but aliue, although thou vvert hidden in the moſt abſtruſe dungeons of Barbarie; for his riches, my brothers and mine vvould fetch thee from thence.

[T]he abſtruſeſt Things / VVhich in the Mindes dark Temper neſtling ly, / By you expoſed are to every Eye.