grasp
noun
understanding of the nature or meaning or quality or magnitude of something
“he has a good grasp of accounting practices”
the limit of capability
“within the compass of education”
an intellectual hold or understanding
“a good grip on French history”
“they kept a firm grip on the two top priorities”
Synonymsgripthe act of grasping
“he released his clasp on my arm”
“he has a strong grip for an old man”
verb
hold firmly
Synonymshold onget the meaning of something
“Do you comprehend the meaning of this letter?”
Source: WordNet 3.1, Princeton University
