English ur-

← German ur- (borrowed)

← English or- (cognate)

← Proto-Germanic *uz- (derived)

← Old High German ur- (derived)

← Proto-Indo-European *uds- (derived)

← Proto-Indo-European *úd (derived)

← Dutch oer- (cognate)

→ English or- (cognate)

→ English urtext (affix)

→ English ur-source (affix)