quetzilpaina.

Headword: 
quetzilpaina.
Principal English Translation: 

to walk quickly; or, to run along on tip toes (see Molina)

Alonso de Molina: 

quetzilpaina. ni. (pret. oniquetzilpain.) andar apriesa, o correr sobre las puntas delos pies.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 89r. col. 2. Thanks to Joe Campbell for providing the transcription.