the act of forming something or generating it (see Molina)
IPAspelling:
tɬɑtɬɑːkɑtiliːlistɬi
Alonso de Molina:
tlatlacatililiztli. el acto de formar assi, o generacion. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 137r. col. 1. Thanks to Joe Campbell for providing the transcription.