to air out, cool, dry, or refresh something by putting it in the open air or in the breeze (see Molina)
Orthographic Variants:
eecauatza, eecahuatza
Alonso de Molina:
eecauatza. nitla. (pret. onitlaeecauatz.) orear algo poniendolo al ayere. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 28r. col. 2. Thanks to Joe Campbell for providing the transcription.