from one wave to another, or from depth to depth
cecema cueyupan. de vna ola enotra, o de onda en onda. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 15r. col. 2. Thanks to Joe Campbell for providing the transcription.