Folk etymology

Folk etymology, pseudo-etymology, or reanalysis is change in a word or phrase over time resulting from the replacement of an unfamiliar form by a more familiar one. Unanalyzable borrowings from foreign languages, like asparagus, or old compounds such as samblind which have lost their iconic motivation (since one or more of the morphemes making them up, like sam-, which meant "semi-", has become obscure) are reanalyzed in a more or less semantically plausible way, yielding, in these examples, sparrow grass and sandblind.