zazaca.

Headword: 
zazaca.
Principal English Translation: 

to transport something from various places (see Karttunen); to move something in a cart; or, to move house (see Molina)

Orthographic Variants: 
zahzaca, çaçaca
IPAspelling: 
sɑhsɑkɑ
Alonso de Molina: 

çaçaca. nitla. (Pret. onitlaçaçacac. ) acarrear algo.
Alonso de Molina, Vocabulario en lengua mexicana y castellana, 1571, (www.idiez.org.mx), f. 13r.

çaçaca. nino. mudar casa. Preteri. oninoçaçacac.
Alonso de Molina, Vocabulario en lengua mexicana y castellana, 1571, (www.idiez.org.mx), f. 13r.

Frances Karttunen: 

ZAHZACA vt to transport something from various places / acarrear algo (M), darse prisa en acarrear de varias partes (C) [(2)Cf.72r]. redup. ZACA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 346.

Attestations from sources in English: 

This is the reduplicative of zaca, to transport.