掌握

to grasp (often fig.) / to control / to seize (initiative, opportunity, destiny) / to master / to know well / to understand sth well and know how to use it / fluency

palm of the hand / sole of the foot / paw / horseshoe / to slap / to hold in one's hand / to wield

to hold / to grasp / to clench (one's fist) / to master / classifier: a handful

to hold; to grasp / to clench (one's fist) / (bound form) to have in one's control / classifier: a handful

PDA / Personal Digital Assistant