appreciation, grasp, hold -- (understanding of the nature or meaning or quality or magnitude of something; "he has a good grasp of accounting practices")
compass, range, reach, grasp -- (the limit of capability; "within the compass of education")
grip, grasp -- (an intellectual hold or understanding; "a good grip on French history"; "they kept a firm grip on the two top priorities"; "he was in the grip of a powerful emotion"; "a terrible power had her in its grasp")
clasp, clench, clutch, clutches, grasp, grip, hold -- (the act of grasping; "he released his clasp on my arm"; "he has a strong grip for an old man"; "she kept a firm hold on the railing")