yet词源

yet: 

[OE] Yet is one of the mystery words of English.

It seems to have emerged from the Anglo-Frisian group of dialects in northeastern Europe before the Angles and Saxons crossed the Channel (Old Frisian had iēta)， but its ultimate source is unknown.

[yet etymology， yet origin， 英语词源]

yet (adv.)

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 pronominal 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.

yet词源

来自 Proto-Germanic * iuta， 来自* iui， 总是，永远，词源同 age，eon， * ta， 名词后缀，词源同 -th 。引申词义总是，永远，尚未。