teteztli.

Headword: 
teteztli.
Principal English Translation: 

something hard, tough (see Karttunen)

IPAspelling: 
tetestɬi
Frances Karttunen: 

TETEZ-TLI something hard, tough / cosa dura (K) [(1)Tp.220]. This is attested in the compound ZACATETEZ-TLI, a type of grass. See TE-TL, TETEZTIC, TETEXTIC.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 235.