yet (adv.) Look up yet at Dictionary.com
Old English get, gieta "till now, thus far, earlier, at last, also," an Anglo-Frisian word (cognates: Old Frisian ieta, Middle High German ieuzo), of unknown origin; perhaps connected to PIE pronomial stem *i- (see yon). The meaning in other Germanic languages is expressed by descendants of Proto-Germanic *noh- (source of German noch), from PIE *nu-qe- "and now." As a conjunction from c.1200.