"Retruse" is a word in ENGLISH

Considered apart from any application to a particular object; separated from matter; existing in the mind only; as, abstract truth, …

Abstract; abstruse; difficult.

Concealed or hidden out of the way.

Remote from apprehension; difficult to be comprehended or understood; recondite; as, abstruse learning.

In an abstruse manner.

The quality of being abstruse; difficulty of apprehension.

The act of thrusting away.

Abstruseness; that which is abstruse.

Communicated orally; oral; -- applied to the esoteric teachings of Aristotle, those intended for his genuine disciples, in distinction from …

Not easily understood; not clear or legible; abstruse or blind; as, an obscure passage or inscription.

Suitable to common people; easy to be comprehended; not abstruse; familiar; plain.

Secret or abstruse part; as, the difficulties and recesses of science.

Hidden from the mental or intellectual view; secret; abstruse; as, recondite causes of things.

Dealing in things abstruse; profound; searching; as, recondite studies.

Direct; clear; intelligible; not abstruse or enigmatical; as, a simple statement; simple language.

Freedom from subtlety or abstruseness; clearness; as, the simplicity of a doctrine; the simplicity of an explanation or a demonstration.