to shine brightly; or, to swarm with lice, fleas, worms, ants, people in the market, or fish in the water (see Molina)
IPAspelling:
kwejoːni
Alonso de Molina:
cueyoni. ni. (pret. onicueyon.) lo mesmo es que cuecueyoca. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 26r. col. 1. Thanks to Joe Campbell for providing the transcription.