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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.
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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

adj.

1590s, from Middle French abstrus (16c.) or directly from Latin abstrusus "hidden, concealed, secret," past participle of abstrudere "conceal," literally "to thrust away," from ab- "away" (see ab-) + trudere "to thrust, push" (see extrusion). Related: Abstrusely; abstruseness.

Online Etymology Dictionary, © 2010 Douglas Harper
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