tlezannen.

Headword: 
tlezannen.
Principal English Translation: 

to what end? what use? (see Karttunen and Molina)

Orthographic Variants: 
tlehzannēn
IPAspelling: 
tɬehsɑnneːn
Alonso de Molina: 

tlezannen? que prouecho se sigue? o que aprouecho. s. lo que sea trabajado?
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 147r. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLEHZANNĒN to what end? what use? / ¿que provecho se sigue? o ¿qué aprovecho… lo que sea trabajado? [(3)Cf.112v,113r,131v]. See TLE(H), ZANNĒN.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 307.

Attestations from sources in English: 

tlezannen (adverb) = to what good? cui bono?
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1877), 166.