to seek something will of ones strength (see Molina)
Alonso de Molina:
tetlamatataquiliztli. procuracion tal. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 108v. col. 1. Thanks to Joe Campbell for providing the transcription.