between the pieces of cloth, or between the pieces of clothing, or below the clothing
Alonso de Molina:
tilmatitlan. entre las mantas, o entre la ropa, o de baxo della. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 113r. col. 2. Thanks to Joe Campbell for providing the transcription.