SPANK
Source: 566, 567
spank. Spank, v.t. to beat, to slap with the open hand
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Spank (�), v. t. [imp. & p. p. Spanked (�); p. pr. & vb. n. Spanking.] [[Of unknown origin; cf. LG. spakken, spenkern, to run and spring about quickly.]] To strike, as the breech, with the open hand; to slap.