to insist and support a cause with great enthusiasm, like someone arguing a case in the High Court (see Molina)
IPAspelling:
teːntɬɑpɑltiliɑ
Alonso de Molina:
tentlapaltilia. nino. (pret. oninotentlapaltili.) lo mesmo es que tenquauhtilia. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 99v. col. 2. Thanks to Joe Campbell for providing the transcription.