something covered (e.g., with a vault) (see Molina)
IPAspelling:
tetɬɑpɑtʃiwki
Alonso de Molina:
tetlapachiuhqui. cosa cubierta de boueda. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 109r. col. 1. Thanks to Joe Campbell for providing the transcription.