the act of covering something, or putting a top on it (see Molina)
IPAspelling:
tɬɑiːʃtɬɑpɑtʃoːlistɬi
Alonso de Molina:
tlaixtlapacholiztli. el acto de cubrir o atapar algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 123r. col. 2. Thanks to Joe Campbell for providing the transcription.