To vomit; to eject the contents of your stomach through your mouth, usually because you are sick or disgusted.
Of uncertain origin, possibly from Dutch 'spuken' or Low German. Some scholars suggest it's imitative of the sound of vomiting. First recorded in English in the early 1600s.
Most words for vomiting are onomatopoeia or crude slang because the action itself is so unpleasant that polite language never quite caught on—society actually avoids naming things it finds disgusting, which is linguistically fascinating.
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