obstruse

comparative obstruser · comparative more obstruse · superlative obstrusest · superlative most obstruse

1. dateduncommonAbstruse.

   And what great advances and mighty progress are daily made in finding out obstruse secrets […]

   1775, “The Tutor”, in A Present for a Son, London, page 82

   2 more examples

   It is very clear that some readily understood method of acquiring the ability to use the mother tongue correctly, to supplant the present obstruse, hard to understand method, is eagerly sought by many[…]

   1877, S. S. Saul, The English Language: Suggestions for Its Correct and Fluent Use Without Technical Grammar, San Leandro, California, page 8

   It has its obstruse philosophical appeal for the thinker, as was noticed in its metaphysical system[…]

   1992 [1950], Martin Luther King Jr., “The Chief Characteristics and Doctrines of Mahayana Buddhism”, in The Papers of Martin Luther King, Jr., Vol. I, University of California Press, page 326