Fully grasped Crossword Clue

 The answer to the crossword clue "Fully grasped" is SEIZED. It has 4 letters.

The word "seized" can mean to take hold of something forcefully or suddenly. It can also mean to understand something completely. In the context of a crossword puzzle, the clue "fully grasped" is likely referring to the latter meaning.

Here are some other possible answers to the crossword clue "fully grasped":

COMPREHENDED

MASTERED

UNDERSTOOD

AWAKENED

REALIZED

The best answer will depend on the specific context of the crossword puzzle.

I hope this helps! Let me know if you have other questions or requests.