to curtail something and make it round, or to make something round (see Molina)
Orthographic Variants:
yaualtequi
Alonso de Molina:
yaualtequi. nitla. (pret. onitlayaualtec.) cercenar ala redonda, o redondear alguna cosa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 31v. col. 1. Thanks to Joe Campbell for providing the transcription.