to find what was being searched for, or to take on enemies (see Molina)
IPAspelling:
iːpɑntiliɑː
Alonso de Molina:
ipantilia. nite. (pret. oniteipantili.) hallar loque se busca, o dar sobre los enemigos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 42r. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
ĪPANTILIĀ vt to hit upon what one is searching for; to fall upon one’s enemies / hallar lo que se busca o dar sobre los enemigos (M) [(1)Cf. I 15r]. applic. ĪPANTIĀ Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 107.