the act of abbreviating or shortening something, or reducing its weight and measure (see Molina)
Alonso de Molina:
tlailochtiliztli. el acto de abreuiar o acortar algo, o merma en peso y medida. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 121v. col. 2. Thanks to Joe Campbell for providing the transcription.