to fix one's cap so it will not fall; to pull back an arch string or crossbow with the thumb; or, to tie something with cords (see Molina)
IPAspelling:
mekɑjoːtɬɑːliɑ
Alonso de Molina:
mecayotlalia. nitla. (pret. onitlamecayotlali) lo mesmo es que mecayotia. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55r. col. 1. Thanks to Joe Campbell for providing the transcription.