fox (n.) Look up fox at Dictionary.com
Old English fox, from Proto-Germanic *fukhs (cognates Old Saxon vohs, Middle Dutch and Dutch vos, Old High German fuhs, German Fuchs, Old Norse foa, Gothic fauho), from Proto-Germanic base *fuh-, corresponding to PIE *puk- "tail" (source also of Sanskrit puccha- "tail").

The bushy tail is also the source of words for "fox" in Welsh (llwynog, from llwyn "bush"); Spanish (raposa, from rabo "tail"); and Lithuanian (uodegis "fox," from uodega "tail"). Metaphoric extension to "clever person" is early 13c. Meaning "sexually attractive woman" is from 1940s; but foxy in this sense is recorded from 1895.
Fox Look up Fox at Dictionary.com
Algonquian people, confederated with the Sac after 1760, translating French renards, which itself may be a translation of an Iroquoian term meaning "red fox people." Their name for themselves is /meškwahki:-haki/ "red earths." French renard "fox" is from Reginhard, the name of the fox in old Northern European fables (as in Low German Reinke de Vos), originally "strong in council, wily."
fox (v.) Look up fox at Dictionary.com
1560s (but perhaps implied in Old English foxung "foxlike wile, craftiness"), from fox (n.). Foxed in booksellers' catalogues means "stained with fox-colored marks." In other contexts, it typically meant "drunk" (1610s).