See an image that represents tentli in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
See some of our additional entries beginning with ten-, which can show the broader reading of tentli as mouth, not just lips. Some hieroglyphs also seem to emphasize the jaw.
motenholcupinticac = her lips are painted with rubber
Fray Bernardino de Sahagún, Primeros Memoriales, ed. Thelma D. Sullivan, et al. (Norman: University of Oklahoma Press, 1997), 102.
ca mocamacpa oallatoa, ca tiiten ca tiicamachal, ca tiinenepil = he speaketh forth from thy mouth. Thou art his lips, thou art his jaw, thou art his tongue (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), 52.
amo popoloc, amo tentzitzipi, amo tentzitzipitlatoa = neither one who stammered, nor [one who talked] as if his tongue were pierced for a ring; nor one with welts on his tongue (16th century, Mexico City)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 2—The Ceremonies, No. 14, Part III, 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, 1951), 65.