verbena (n.)youdaoicibaDictYouDict[verbena 词源字典]
genus of plants, the vervain, 1560s, from Latin verbena "leaves or twigs of olive, myrtle, laurel, or other sacred plants employed in religious ceremonies," from PIE *werbh- (cognates: Lithuanian virbas "twig, branch, scion, rod"), from root *werb- "to turn, bend" (see warp (v.)).[verbena etymology, verbena origin, 英语词源]