WORDS OF UNKNOWN ORIGIN
When the source of a word appearing as a main entry is unknown, the expression "origin unknown" is usually used. Only in exceptional circumstances (as with some ethnic names) does the absence of an etymology mean that it has not been possible to furnish an informative etymology. More often, it means that no etymology is believed to be necessary. This is the case, for instance, with most of the entries identified as variants and with many derivatives.
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