tencuepa. nino. desdezirse o retratarse. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 98v. col. 2. Thanks to Joe Campbell for providing the transcription.
Attestations from sources in English:
tentli (lip) + cuepa (turn) Robert Haskett and Stephanie Wood's notes from Nahuatl sessions with James Lockhart and subsequent research.