first, at first (adverb) (central Mexico, sixteenth century) R. Joe Campbell, Florentine Codex Vocabulary, 1997 .
Orthographic Variants:
acachtopa
Alonso de Molina:
acachto. primero, o primeramente. aduerbio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 1r. col. 2. Thanks to Joe Campbell for providing the transcription.