eyi.

Headword: 
eyi.
Principal English Translation: 

three (see Karttunen)

Orthographic Variants: 
ēyi, yei, yeyi
IPAspelling: 
eːyi
Frances Karttunen: 

ĒY(I) three / tres (M) A variant form is YĒY(I). The internal Y reveals itself in forms like YĒXCĀN, where it undergoes spirantization, Y ˃ X. In other compounds this has the form Ē- with no final consonant. See (Y) ĒY(I).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 79.