The Tlaxcalan Actas: A Compendium of the Records of the Cabildo of Tlaxcala (1545-1627), eds. James Lockhart, Frances Berdan, and Arthur J.O. Anderson (Salt Lake City: University of Utah Press, 1986), 2.
a suffix meaning miserable or wretched; a particle that, when placed after a noun, increases its significance, usually in malam partem [in a perjorative sense] like azo in Spanish
Horacio Carochi, S.J., Grammar of the Mexican language with an explanation of its adverbs (1645), translated and edited with commentary by James Lockhart, UCLA Latin American Studies Volume 89 (Stanford: Stanford University Press, UCLA Latin American Center Publications, 2001), 43.