arcturus
‘the brightest star of the constellation Bootes’
Lexical development traced from the Tamil root:
E. arthurus, arturis, arture, ariture < Lat. arcturus < Gk. arktouros ‘guardian of the bear’ < O.F. artique < Med.Lat. articus < Lat. arcticus < arktikos ‘of the north’ < arktos ‘bear, the northern constellation Ursa Major’ < aak < rkto- < Tamil ar