pentothal
‘a trademark used for thiopental sodium’
Lexical development traced from Tamil root:
E. pent- < Gk. penta- combining form of pente ‘five’ < Aeo. pempte + th (first two letters of thiobarbiturate) + -ol <pentuh < penkwe- < Tamil aintu
pentothal
English words derived from Tamil aintu connoting ‘the number five’