clap (v.)
[of two people's hands] strike together, clasp [to seal a bargain]
H5 V.ii.129[King Henry to Katherine] Give me your answer ... and so clap hands, and a bargain
WT I.ii.104[Leontes to Hermione] I could make thee open thy white hand / And clap thyself my love
SHAKESPEARE'S WORDS © 2018 DAVID CRYSTAL & BEN CRYSTAL