zammatca.

Headword: 
zammatca.
Principal English Translation: 

slowly, bit by bit

Orthographic Variants: 
çammatca
Alonso de Molina: 

zammatca. mansamente, poco apoco, o contiento.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 14r. col. 1. Thanks to Joe Campbell for providing the transcription.