POXCAHU(I) to get moldy, dank / enmohecerse o henchirse alguna cosa de orín (M) [(2)Zp.52,183]. See POXCAHUIYA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 204.
Attestations from sources in English:
puxcamotli = a variety of camote (poxcauh- = moldy) Frances F. Berdan and Patricia Rieff Anawalt, The Codex Mendoza, 1992, vol. 1, 200).