to go back on one's word
to be in dispute; to copy something (See Karttunen)
a swallow's beak
Thelma D. Sullivan, "Nahuatl Proverbs, Conundrums, and Metaphors, Collected by Sahagún," Estudios de Cultura Náhuatl 4 (1963), 110–111.
something sharp, something with a cutting edge (see Karttunen and Molina)
to express, choose, elect
something stated, mentioned, uttered; something worthy of praise
renown