euhteua. n. (pret. oneuhteuac.) partirse con aceleramiento y corriendo para alguna parte. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 29v. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
ĒUHTĒHUA to leave, go / partirse con aceleramiento y corriendo para alguna parte (M), sale… se va (Z) [(1)Zp.153]. This consists of two instances of the verb ĒHUA joined by the -TL- ligature. Such constructions are not incongruous in Nahuatl. See ĒHUA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 78.