dishwater, dirty water; or, the act of washing (see Molina)
IPAspelling:
tɬɑpɑːkɑtɬ
Alonso de Molina:
tlapacatl. lauazas, o lauaduras. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 130r. col. 2. Thanks to Joe Campbell for providing the transcription.