16.1.07

ab·struse

ab·struse  [ab-stroos]
–adjective
1.
hard to understand; recondite; esoteric: abstruse theories.
2.
Obsolete. secret; hidden.

[Origin: 1590–1600; Latin abstrūsus, past participle of abstrūdere, to hide : abs-, ab-, away; + trūdere, to push; see treud- in Indo-European roots.]

—Related forms
ab·struse·ly, adverb
ab·struse·ness, noun

—Synonyms 1. incomprehensible, unfathomable, arcane.
—Antonyms 1. clear, uncomplicated, simple; obvious.

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