arrow, harpoon (see Molina); or, the crest or guiding feathers on a spear, vane (see Karttunen)
IPAspelling:
tʃitʃikilli
Alonso de Molina:
chichiquilli. flecha harpon. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 20r. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
CHICHIQUIL-LI crest, guiding feathers on a spear, vane / flecha arpón (M) [(2)Tp.129]. The two attestations are in compounds meaning ‘spine’ and ‘cock’s crest.’ Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 49.