When used, the umbrella automatically opens or closes with one hand lightly handling the hand grab handle.

使用时只要一只手轻轻一握手握柄，雨伞便自动打开或收拢。

youdao

If shaking hands with someone you've already met, you might even consider the two-hand grab: placing your free hand on the other person's elbow adds warmth and enthusiasm to the handshake.

如果你同之前相识的人握手的话，你可以考虑双手握住他：将你空出的另一只手置于他的手肘上，这会使你显得更热情。

youdao

I managed to grab her hand.

我设法抓住了她的手。

《柯林斯英汉双解大词典》

Meysy turned to follow them, when he felt Mr. Mindon's hand grab his arm.

VOA: special.2009.01.31

Meysy turned to follow them, when he felt Mister Mindon's hand grab his arm.

VOA: special.2010.05.29

"You'd ask her to grab your hand and she would grab your hand, " he said.

NPR: Major Findings In Records About Giffords Shooting

Someone notices his watch and a hand seems to grab something from one of his front pockets.

CNN: STORY HIGHLIGHTS

Robbins closed the coin in his own hand and had Josh grab his wrist.

NEWYORKER: A Pickpocket��s Tale