abstruse

Từ điển American Heritage Dictionary 4th

ab·struse (ăb-stro͞osʹ, əb-)adj.
Difficult to understand; recondite. See Synonyms at ambiguous. [Latin abstrūsus, past participle of abstrūdere, to hide : abs-, ab-, away; see ab-¹ + trūdere, to push; See treud- in Indo-European Roots.] ab·struseʹly adv.ab·struseʹness n.

• Từ đồng nghĩa / Synonyms:
  deep, recondite