shellac
‘refined lac, used as a varnish’
Lexical development traced from the Tamil root:
E. shellack, shel-lack, shell-lake, shell-lac < shell + lac < F. lacce < lacca < Med.Lat. lacca < Pers. lak < Hin. lakh < Skt. laksha ‘red dye’ < lak < arakku ‘resin’ < Tamil ar