a two-year-old colt (see Molina)
(partly a Spanish loanword, caballo, horse)
Orthographic Variants:
onxiuhtia cauallo
Alonso de Molina:
onxiuhtia cauallo. potro de dos años. et sic de alijs. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 77v. col. 1. Thanks to Joe Campbell for providing the transcription.