to establish the boundaries or boundary markers around a city or town (see Molina); this construction also seems to refer to a wall (SW)
IPAspelling:
ɑːltepeːtenɑːnketsɑ
Alonso de Molina:
altepetenanquetza. n. (pret. onaltepetenanquetz.) poner terminos o mojones ala ciudad. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 4r. col. 2. Thanks to Joe Campbell for providing the transcription.