ahuachtli.

Headword: 
ahuachtli.
Principal English Translation: 

drew, drizzle, mist (see Karttunen)

Orthographic Variants: 
ahhuachtli
IPAspelling: 
ɑhwɑtʃtɬi
Frances Karttunen: 

AHHUACH-TLI drew, drizzle, mist / rocío (K) This is implied by the many compounds of of which it is an element.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 5.

Attestations from sources in English: 

ahuachtli (n) = dew, moisture
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1887), 149.

themes: 
Weather, Climate