基輔

Kyiv or Kiev, capital of Ukraine

(bound form) base; foundation / (bound form) radical (chemistry) / (bound form) gay (loanword from English into Cantonese, Jyutping: gei1, followed by orthographic borrowing from Cantonese)

to assist / to complement / auxiliary

Kievan Rus', East Slavic state that reached its peak in the early to mid-11th century