Irish obair

← Proto-Indo-European *h₃ep- (derived)

← Latin opera (derived)

← Old Irish opar (inherited)

→ Irish oibrigh (affix)

→ Irish athobair (affix)

→ Irish oibrí (affix)

→ Irish grúpobair (affix)

→ Irish obair bhaile (affix)

→ Manx obbyr (cognate)