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Old English spiwan "spew, spit," from Proto-Germanic *spiwanan (cf. Old Saxon spiwan, Old Norse spyja, Old Frisian spiwa, Middle Dutch spien, Dutch spuwen, Old High German spiwan, German speien, Gothic spiewan "to spit"), from PIE *sp(y)eu-, probably ultimately of imitative origin (cf. Latin spuere, Greek ptuein, Old Church Slavonic pljuja, Lithuanian spiauti). Also in Old English as a weak verb, speowan. Related: Spewed; spewing.
"vomited matter," c.1600, from spew (v.).