Old English wir "metal drawn out into a fine thread," from Proto-Germanic *wira- (cognates: Old Norse viravirka "filigree work," Swedish vira "to twist," Old High German wiara "fine gold work"), from PIE *wei- (1) "to turn, twist, plait" (cognates: Old Irish fiar, Welsh gwyr "bent, crooked;" Latin viere "to bend, twist," viriæ "bracelets," of Celtic origin). A wire as marking the finish line of a racecourse is attested from 1883; hence the figurative down to the wire. Wire-puller in the political sense is 1848, American English, on the image of pulling the wires that work a puppet.

c.1300, "adorn with (gold) wire," from wire, n.. From 1859 as "communicate by means of a telegraphic wire;" 1891 as "furnish with electrical wires and connections." Related: Wired; wiring.