1392, possibly from a Scand. source related to O.N. sokkva
"to sink," or from M.L.G. sacken
"to sink" (as dregs in wine), from denasalized derivative of P.Gmc. base *senkwanan
"to sink" (see sink
). A general North Sea Gmc. word (cf. Du. zakken,
). The noun is first recorded 1861.