to have a bite of food get caught in the throat (see Molina)
Orthographic Variants:
eltzaqua
Alonso de Molina:
eltzaqua. nin. (pret. onineltzacu.) atrauesarseme el bocado. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 29r. col. 1. Thanks to Joe Campbell for providing the transcription.