the act of consuming and finishing all of something, carefulness and diligence that is put into a business (see Molina)
Alonso de Molina:
tlacentlamiliztli. el acto de consumir y acabar todo quanto auia, del entero cuidado y diligencia que se ponen en algun negocio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 116v. col. 2. Thanks to Joe Campbell for providing the transcription.