to solder, to join one piece of metal to another (see Molina)
Orthographic Variants:
tepuzzaloa
Alonso de Molina:
tepuzzaloa. ni. (pret. onitepuzalo.) soldar o juntar vn metal con otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 103v. col. 2. Thanks to Joe Campbell for providing the transcription.