the.com/applaud
The only socially sanctioned way to slap your hands together in public.
means To express approval by clapping the hands, or more broadly to praise someone's action or decision.
from From Latin applaudere, to strike together — the same plaudere that gave Roman crowds their right to demand a play's encore by clapping.
Theater rootsRoman plays ended with actors literally requesting applause.
Hired handsClaques were paid crowds planted to applaud on cue.
Plausible cousinSame root gives us applause, plaudits, and plausible.