Dear bridget96: re: spit

spit or [Chiefly Brit.] spat, spit4ting 5ME spitten < OE spittan, akin to Dan spytte: for IE base see SPEW6
1 to eject from within the mouth
2 to eject, throw (out), emit, or utter explosively !to spit out an oath

The Superintendent of the Mass Public Health Biologic Labs was Danish, and he said jokingly that Danish was not a language, it was a throat disease.

It does sound as though the Danish origin of "spit" might very well have been ononmatopoeic.