beladono (accusative singular beladonon, plural beladonoj, accusative plural beladonojn)
From Italian belladonna (bella donna, literally “beautiful lady”), altered by folk etymology from Medieval Latin bladona (“nightshade”), from Gaulish *blātōnā, blātunā, from Proto-Celtic *blātus (“flower”), from Proto-Indo-European *bʰléh₃tus, from *bʰleh₃- (“blossom, flower”). The folk etymology was motivated by the cosmetic use of nightshade for dilating the eyes.