to turn something upside down, or to put the part that is on top toward the bottom (see Molina)
IPAspelling:
tsonikkwepɑ
Alonso de Molina:
tzoniccuepa. nitla. (pret. onitlatzoniccuep.) boluer algo boca abaxo, o lo de arriba abaxo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 153r. col. 2. Thanks to Joe Campbell for providing the transcription.