tapped into something; seized in something; opportunist in something (see Molina)
Orthographic Variants:
iyullo macic
Alonso de Molina:
iyullo macic. aprouechado en algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 37r. col. 1. Thanks to Joe Campbell for providing the transcription.