someone who is disobedient, stubborn, obstinate (see Molina)
Alonso de Molina:
atetlacamatini. desobediente y contumaz. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7v. col. 2. Thanks to Joe Campbell for providing the transcription.