Principal English Translation:
negative particle with optative; that not, that should not
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 223.
Alonso de Molina:
macamo. no. s. se haga. &c.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 50r. col. 1. Thanks to Joe Campbell for providing the transcription.
Horacio Carochi / English:
mācamō = negative particle with optative
màcamō = that not, that should not
Lockhart’s Nahuatl as Written:
compound particle. mā, c(a) "ligature," mō.
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 223.
Attestations from sources in English:
Mācamo xicchīhua in = Don't (s.) do this;
Mācamo quicōhua etl = Let him not buy beans
Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 81.
aiac mocauh in macamo mjc = None remained who had not perished central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 3 -- The Origin of the Gods, Part IV, 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, 1978), 1.
Attestations from sources in Spanish:
macamo quivecavazque in teilpiloyan = no harán permanecer por mucho tiempo en la cárcel (Cuauhtinchan, Puebla, s. XVI)
Luis Reyes García, "Ordenanzas para el gobierno de Cuauhtinchan, año de 1559," Estudios de Cultura Náhuatl 10 (1972), 260–261.macamo mochipa yc mochalanitinemizq = que no siempre vivan en desorden. (Tetzcoco, 1585)
Benjamin Daniel Johnson, “Transcripción de los documentos Nahuas de Tezcoco en los Papeles de la Embajada Americana resguardados en el Archivo Histórico de la Biblioteca Nacional de Antropología e Historia de México”, en Documentos nahuas de Tezcoco, Vol. 1, ed. Javier Eduardo Ramírez López (Texcoco: Diócesis de Texcoco, 2018), 94–95.