Something Difficult to Grasp or Puzzling

This page is the CodyCross answer for the clue below from Space Exploration, Group 916, Puzzle 3 (Scientific Research).

Question is: Something Difficult to Grasp or Puzzling

and the answer is: ENIGMA

Word Meaning:

ENIGMA — Something or someone puzzling, mysterious or inexplicable.

Definitions from Wiktionary.

Something Difficult To Grasp Or Puzzling - Space Exploration CodyCross Answers | CodyCross Solutions