nanahuapatli.

Principal English Translation: 

medicinal plant used to alleviate syphilis (see Karttunen)

Orthographic Variants: 
nānāhuapahtli
IPAspelling: 
nɑːnɑːwɑpɑhtɬi
Frances Karttunen: 

NĀNĀHUAPAH-TLI medicinal plant used to alleviate syphilis / cierta planta medicinal, especialmente contra la gálico (R) [(1)Rp.108]. See NĀNĀHUA-TL, PAH-TLI.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 159.

Attestations from sources in English: 

Also called palancapatli. Said to be able to cure "sores" and the bite of a viper called the mahuaquitli; a handful of the herb, when crushed and added to water, was believed to cure "the French or the Neapolitan disease, drying up and getting rid of the little sores and little swellings all over the body;" this illness was said to have "its origin in these West Indies and was spread to other regions of the Old World...."
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), 141.

themes: 
Health, Sickness, Wellness, Medicine
Plants, Trees, Flora