a vihuela (guitar-like instrument), or harp (see Molina)
Orthographic Variants:
mecaueuetl, mecauehuetl
IPAspelling:
mekɑweːweːtɬ
Alonso de Molina:
mecaueuetl. viguela, o harpa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55r. col. 1. Thanks to Joe Campbell for providing the transcription.