ahuachquiyahui.

Headword: 
ahuachquiyahui.
Principal English Translation: 

to drizzle, to rain lightly (see Karttunen and Molina)

Orthographic Variants: 
auachquiyaui
IPAspelling: 
ɑhwɑtʃkiyɑwi
Alonso de Molina: 

auachquiyaui. (pret. oauachquiauh.) llouiznar.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 9r. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

AHHUACHQUIYAHU(I) to rain lightly / lloviznar (M)[(2)Tp.107] See AHHUACH-TLI, QUIYAHU(I)-TL.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 5.