a throwing of the ball, or the splashing of something liquid (?) (see Molina)
IPAspelling:
tɬɑtsikwiniːlistɬi
Alonso de Molina:
tlatzicuiniliztli. bote de pelota, o salpicadura de cosa liquida. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 142v. col. 2. Thanks to Joe Campbell for providing the transcription.