something entirely understood and known (see Molina)
Alonso de Molina:
tlamacica cactli. cosa enteramente entendida y sabida. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 125r. col. 2. Thanks to Joe Campbell for providing the transcription.