slap · palm of the hand · a board/plank placed under the lower beam of an upright loom
köken: Cognate with Turkish şaplak. Likely from earlier *çapalaq, from çapmaq (“to cut, chop”), which has in its current meaning not preserved the original sense "to hit" reconstructed for Proto-Turkic *čap- (“to beat, hit; attack; rob”).
köken: Of unknown origin. Originally used by Romans to refer to the strike given from master to slave upon manumission as a final act of indignity. First attested in Phaedrus when the Empire was already greatly expanded, then in the Semitic loanword-ridden Juvenal and largely attested in the Christian writings, i. e. from the proponents of a Semitic religion. Hence, probably from Aramaic אַלַּף (allap̄,…
köken: From bufet + -ada. Compare Spanish bofetada.
Etimoloji
From Byzantine Greek χαστούκι (khastoúki), of unknown origin. Due to the phonetics and phonotactics of the term, it is suspected to be an Arabic borrowing, though particularly strong candidates are lacking. Possible comparanda include Arabic خَدّ (ḵadd, “cheek”) under this theory. It also appears plausible that the term is onomatopoeic.