to cover something, to put up a canopy over something (see Molina)
Orthographic Variants:
quachcallalia
Alonso de Molina:
quachcallalia. nitla. (pret. onitlaquachcallali.) emparamentar algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 84r. col. 1. Thanks to Joe Campbell for providing the transcription.