cuapapatztic.

Headword: 
cuapapatztic.
Principal English Translation: 

a newborn whose crown is still not closed, soft spot still not closed; refers metaphorically to one who still lacks experience in the things of life (see Molina)

Orthographic Variants: 
quapapatztic
Alonso de Molina: 

quapapatztic. lo mesmo es que quacecelicapil.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 85r. col. 2. Thanks to Joe Campbell for providing the transcription.

themes: 
Anatomy
Children, Childhood, Adolescence
Metaphors, Proverbs, Riddles