grasp

noun

A firm hold or grip, or the extent of one's understanding.

"The solution was within her grasp."

verb

To take hold of something firmly, or to understand an idea completely.

"She quickly grasped the complex instructions."

Thesaurus

Synonyms: grip, hold on, reach, range, compass, dig, comprehend, savvy, grok, apprehend, get the picture, clutches