to feel not guilty about what others are accusing; or not to be bothered by one's conscience (see Molina, who puts this in the first person singular, "my heart knows nothing")
a small, deadly herb that lies on the ground near a source of water; while it can be a remedy for skin sores, it causes burning and blistering; people and animals can die from it Sahagún, Bernardino de, Antonio Valeriano, Alonso Vegerano, Martín Jacobita, Pedro de San Buenaventura, Diego de Grado, Bonifacio Maximiliano, Mateo Severino, et al. Historia general de las cosas de Nueva España (Florentine Codex), Ms. Mediceo Palatino 218–20, Biblioteca Medicea Laurenziana, Florence, MiBACT, 1577. Available at Digital Florentine Codex/Códice Florentino Digital, edited by Kim N. Richter, Alicia Maria Houtrouw, Kevin Terraciano, Jeanette Peterson, Diana Magaloni, and Lisa Sousa, bk. 11, fol. 131r. Los Angeles: Getty Research Institute, 2023. https://florentinecodex.getty.edu/en/book/11/folio/131r?spTexts=&nhTexts= . Accessed 17 November 2025.
to reduce something to nothing; to reduce oneself to nothing; to diminish, belittle, or humiliate others (see Molina); to ruin or destroy someone or something (see Karttunen)
a shrub with willow-like stems and leaves; the flowers are large and white (Central Mexico, 1571–1615) The Mexican Treasury: The Writings of Dr. Francisco Hernández, ed. Simon Varey, transl. Rafael Chabrán, Cynthia L. Chamberlin, and Simon Varey (Stanford: Stanford University Press, 2000), 130.