folk etymology

An example of folk etymology is the dialectal English word sparrowgrass for asparagus. Folk etymology is a change in a word or phrase resulting from the replacement of an unfamiliar form by a more familiar one through popular usage. The form or the meaning of an archaic, foreign, or otherwise unfamiliar word is reinterpreted as resembling more familiar words or morphemes.

The term folk etymology is a loan translation from German Volksetymologie, coined by Ernst Förstemann in 1852. Folk etymology is a productive process in historical linguistics, language change, and social interaction. Reanalysis of a word's history or original form can affect its spelling, pronunciation, or meaning. This is frequently seen in relation to loanwords or words that have become archaic or obsolete.