to tie something again or to tie it very tightly (see Molina)
Alonso de Molina:
oppa niquilpia. (pret. oppa oniquilpi.) reatar algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 77v. col. 2. Thanks to Joe Campbell for providing the transcription.