amamachiyotlacuiloltzacua.

Headword: 
amamachiyotlacuiloltzacua.
Principal English Translation: 

to put a seal or a stamp on a piece of writing (see Molina)

Orthographic Variants: 
amamachiotlacuiloltzaqua, amamachiyotlacuiloltzaqua
Alonso de Molina: 

amamachiotlacuiloltzaqua. n. (pret. onamamachiotlacuiloltzacu.) sellar escriptura.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 4v. col. 1. Thanks to Joe Campbell for providing the transcription.