To take hold of something firmly usu using the whole hand. Grasp all and lose all.
He grasped her by the hand.
To hold something firmly and tightly with one's arms or hand round.
The child clasped his doll protectively.
To grasp something quickly and greedily.
It suggests eagerness or an anxiety in seizing or grasping and may implies less success in holding.
The mother clutched her baby in his arms.
To take hold of suddenly with force.
The animal seized its prey.
to seize sb by the hand/to seize something from sb.
To grasp something quickly and suddenly sometimes secretly
It suggests more suddenness or quickness but less force than seize.
The thief snatched her purse and ran away.
(infml) It implies more roughness and rudeness than snatch.
She grabbed his arms and pulled him out of the room.
To take a very tight hold of something esp. with your fingers or with a tool.
He gripped the nail and pulled it out.