be certain, understand this (a command to an individual) (see Molina)
Orthographic Variants:
maueliuhye ymmoyollo
Alonso de Molina:
maueliuhye ymmoyollo. sey cierto, o ten entendido. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 54r. col. 1. Thanks to Joe Campbell for providing the transcription.