to cause a chattering noise (see Karttunen) (an onomatopoetic word)
IPAspelling:
tʃɑtʃɑlɑtsɑ
Frances Karttunen:
CHACHALATZ(A) vt to cause a chattering noise / se dice del que causa este ruido (C for CHACHALACA) [(1)Cf.73v]. See CHALĀN(I). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 44.