tenacecec.

Headword: 
tenacecec.
Principal English Translation: 

something tasteless, insipid (See Karttunen)

Orthographic Variants: 
tēnācecēc
IPAspelling: 
teːnɑːseseːk
Frances Karttunen: 

TĒNĀCECĒC something tasteless, insipid / insípido, desabrido, soso (Z) [(4)Zp.41,72,117,220]. Z consistently has a long vowel in the final syllable. If the literal meaning of this is 'something that tastes like cold water’, the final element should be CECEC with both vowels short See TĒN-TLI, Ā-TL, CECEC.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 224.