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Abstruse From  Ab Adjective Of  Ab·Struse  Latin  Abstrusus

Title Abstruse
Text
Merriam-Webster's Collegiate Dictionary
ab·struse
\\əb-ˈstrüs, ab-\\ adjective
 ETYMOLOGY  Latin abstrusus, from past participle of abstrudere to conceal, from abs-, ab- + trudere to push — more at 
threat
 DATE  1599
: difficult to comprehend : 
recondite

    the abstruse calculations of mathematicians
• ab·struse·ly adverb
• ab·struse·ness noun
English Etymology
abstruse
  c.1600, from L. abstrusus, pp. of abstrudere "conceal," lit. "to thrust away," from ab- "away" + trudere "to thrust, push" (see extrusion).
Oxford Advanced Learner's Dictionary-牛津双解-OALD7
abstruse
ab·struse Eb5stru:sAb- / adjective   (formal, often disapproving)difficult to understand
   难解的;深奥的:
   an abstruse argument 
   玄奥的论点 
Webster's Third New International Dictionary, Unabridged
ab·struse
\əbzˈtrüs, (ˈ)abz|t-, əbˈst-, -ab|st-\ adjective
(sometimes -er/-est)
Etymology: Latin abstrusus concealed, from past participle of abstrudere to push away, conceal, from abs- (variant of ab- ab- (I)) + trudere to push, thrust — more at 
threat

1. obsolete : 
concealed
hidden

 < the eternal eye whose sight discerns abstrusest thoughts — John Milton >
2. : difficult to comprehend or understand : 
recondite

 < the abstruse calculations of mathematicians >
 < involved and abstruse language >

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