Wiktionary
vb. 1 To raise one's arm and hand. 2 (context idiomatic English) To volunteer.
Usage examples of "raise a hand".
They watched Antsy raise a hand, halt those following with a gesture, then inscribe a circle in the air with his index finger.
She didn't need her lore to tell her that Raif would never raise a hand against Drey.
Not because the man was the Dragon Reborn, but because he had promised Egwene not to raise a hand against al'Thor.
He had to stop them: raise a hand, a moan, anything to signal that this leave-taking was premature.
Over to his left, behind the Gorhaut centre, Blaise saw Fulk de Savaric lift his head to his cry, raise a hand in response, and then turn to relay urgent orders to his men.
Most likely theyd never have had the guts to raise a hand against me.
I've never had so much as one of them raise a hand to me, my gentleman, or their Irish officers.
He may have killed a few reputations, but I've never known him to raise a hand to anyone.
But I couldn't see the pinnacle from sea level, and when the engines screamed and the invisible force pushed me back into the cushions, I looked but was blinded by tears, and couldn't raise a hand to wipe them away.
Rod saw his mother raise a hand, seem about to speak, then close her mouth.
He tried to raise a hand and to murmur something in protest, but a sweet smell was in his nostrils, and a sense of rich peace and lethargy stole over his jangled nerves.
If you won, youd be cut loose to make your own way and no one in the cityd raise a hand against you.