to master a skill or subject; to understand well and be able to use something fluently

the assurance or confidence in a successful outcome

to shake hands

to grasp or hold something firmly

to hold firmly, not let go

to hold or grasp something firmly with the hand

to make a fist

to hold or possess power, control, or an opportunity firmly

to have or hold (usually something abstract, such as power, rights, or a bargaining chip)

to stop arguing or fighting and reach a reconciliation by shaking hands.

to have the mantle of victory within one's grasp; to be confident of success or victory

to be in a position of power; to hold the reins of power

strength of one's grip

to shake hands (usually at parting)

to possess extraordinary intelligence and confidence; to have a thorough plan or solution well in hand

to be assured of success

to hold in one's hand or grip