for one's forehead to hurt as a result of carrying a load by means of a tumpline (mecapalli)
Orthographic Variants:
quamecatlatla
Alonso de Molina:
quamecatlatla. ni. (pret. oniquamecatlatlac.) dolerme la frente dela carga que lleuo con mecapalli. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 85r. col. 1. Thanks to Joe Campbell for providing the transcription.