| − | Unclear. Maybe related to {{etyl|cu|-}} {{term|рабъ|tr=rabŭ||farmhand|lang=cu}} and {{term|работа||slavery|tr=rabota|lang=cu}}<ref>{{R:EWddS|ed=22|hw=Arbeit}}</ref> (Proto-Slavic {{recons|orbota|lang=sla-pro}}). | + | Unclear. Maybe related to {{etyl|cu|-}} {{term|рабъ|tr=rabŭ||farmhand|lang=cu}} and {{term|работа||slavery|tr=rabota|lang=cu}}<ref>{{R:EWddS|ed=22|hw=Arbeit}}</ref> (Proto-Slavic {{recons|orbota|lang=sla-pro}}). Possibly also linked to a verb ''*arƀējō'' 'be orphaned', {{recons|arbijô|lang=gem-pro}}. See also Proto-Indo-European {{recons|*Hórbʰos|lang=ine-pro}}, whence Ancient Greek {{term|ὀρφανός|orphanos|lang=grc}}, Latin {{term|orbus|lang=la}}. |