köken: From Latin betōnica or ve(t)tōnica, from Vettones, a people in Lusitania of possible Celtic origin, either Gaulish, Celtiberian, or Hispano-Celtic. Compare French bétoine, Spanish betónica.
any plant of the genus Stachys; known by multiple common names in English including hedgenettle, heal-all, self-heal, woundwort, betony, and lamb's ears · the genus Stachys
18th century, from Lower Sorbian cysć and/or Upper Sorbian čist, themselves derived from Proto-Slavic *čistъ (“pure”) because of the plant’s use as a blood purifier (cf. English woundwort). Cognate with Polish czyściec, Czech čistec.