momamatini. empachoso o vergonzoso. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 58v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
MOMĀMATINI someone timid, embarrassed / el que tiene empacho (C) [(1)Cf.44r]. See MĀMAT(I). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 152.