Principal English Translation: 

a word element that means "young" (e.g. found in ichpochtli and telpochtli) (see Karttunen)

Orthographic Variants: 
Frances Karttunen: 

-PŌCH This element of (I)CHPŌCH-TLI 'young woman' and TĒLPŌCH-TLI 'young man' forms its plural by reduplication, -PŌPŌCHTIN, implying that (I)CH and TĒL are modifiers, but these elements do not appear independently in other constructions.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 199.