See an image that represents xomolli in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
a corner
Joe Campbell's List of Nahuatl Morphemes, 1996; http://www2.potsdam.edu/schwaljf/Nahuatl/nahmor1.txt
Xomolli, tlayoualli ticmotoctia. Inin tlatolli, itechpa mitoaya: in iquac aca ixtlamati, anozo mozcaliani, iximacho pilli, anozo tecutli: auh zatepan quipoloa in imauizyo. = You hide yourself in a corner, in the dark. This was said when some able person, perhaps an experienced and renowned noble or official, lost his good name.
Thelma D. Sullivan, "Nahuatl Proverbs, Conundrums, and Metaphors, Collected by Sahagún," Estudios de Cultura Náhuatl 4 (1963), 176–177.
ca njxpopoiotl ca njtlaiooalli, ca njxomolli ca njcaltechtli = for I am blind, I am darkness; I am the corner, I am the wall (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 6 -- Rhetoric and Moral Philosophy, No. 14, Part 7, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 44.