Medicinal Root Used to Reduce Fever and Kill Germs

This page is the CodyCross answer for the clue below from Making a Documentary, Group 1502, Puzzle 1 (Director and Actors).

Question is: Medicinal Root Used to Reduce Fever and Kill Germs

and the answer is: BURDOCK

Word Meaning:

BURDOCK — Any of the species of biennial thistles in the genus Arctium.

Definitions from Wiktionary.