ceceyaca.

Headword: 
ceceyaca.
Principal English Translation: 

each one for him or herself; or to each one (see Molina)

IPAspelling: 
sesejɑkɑ
Alonso de Molina: 

ceceyaca. cada vno porsi, o cada qual, o acada vno. aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 15r. col. 1. Thanks to Joe Campbell for providing the transcription.

ceceyaca. cada qual, o cada vno por si, o a cada vno por si. aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 15v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

niman ceceyaca quiçaya, çan petlauhtiuja = then each on separately set forth, going quite naked (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 8 -- Kings and Lords, no. 14, Part IX, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1951), 81.