Principal English Translation: 

a relic, the remainder of someone or something (a necessarily possessed form; see Karttunen)

Orthographic Variants: 
Frances Karttunen: 

-NECĀUHCĀ necessarily possessed form relic, remainder of someone, something / reliquia (C) [(1)Bf.8r,(2)Cf.49r]. M has unpossessed necauhcayoll with the same sense. See CĀHU(A).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 160.