tonameyo.

Headword: 
tonameyo.
Principal English Translation: 

something with clarity, like a ray of sun (see Molina)

Alonso de Molina: 

tonameyo. cosa con claridad de rayo del sol.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 149v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

tonameyo (adjective) = shining like the sun, glittering
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1877), 166.