aactializtli.

Headword: 
aactializtli.
Principal English Translation: 

the act of trotting

Alonso de Molina: 

aactializtli. trote. del que camina.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 1r. col. 1. Thanks to Joe Campbell for providing the transcription.