something that is felt a lot, or hurts, and reaches the entrails and can relate to both the good and the difficult birth (?) (see Molina)
Alonso de Molina:
teitic acic. lo mesmo es que teitec acic. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 95r. col. 2. Thanks to Joe Campbell for providing the transcription.