a dish for the water of the hands (see Molina), i.e. for hand washing?
IPAspelling:
nemɑːteːkiːlkɑʃitɬ
Alonso de Molina:
nematequilcaxitl. plato para agua manos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 67r. col. 2. Thanks to Joe Campbell for providing the transcription.