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abstruse

[ab-stroos] /æbˈstrus/
adjective
1.
hard to understand; recondite; esoteric:
abstruse theories.
2.
Obsolete. secret; hidden.
Origin
1590-1600
1590-1600; < Latin abstrūsus thrust away, concealed (past participle of abstrūdere), equivalent to abs- abs- + trūd- thrust + -tus past participle suffix
Related forms
abstrusely, adverb
abstruseness, noun
Can be confused
abstruse, obtuse.
Synonyms
1. incomprehensible, unfathomable, arcane.
Antonyms
1. clear, uncomplicated, simple; obvious.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for abstruseness

abstruse

/əbˈstruːs/
adjective
1.
not easy to understand; recondite; esoteric
Derived Forms
abstrusely, adverb
abstruseness, noun
Word Origin
C16: from Latin abstrūsus thrust away, concealed, from abs-ab-1 + trūdere to thrust
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for abstruseness
abstruse
c.1600, from L. abstrusus, pp. of abstrudere "conceal," lit. "to thrust away," from ab- "away" + trudere "to thrust, push" (see extrusion).
Online Etymology Dictionary, © 2010 Douglas Harper
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