necihuahuatiliztli.

Headword: 
necihuahuatiliztli.
Principal English Translation: 

a man's marriage to a woman (see Molina)

Orthographic Variants: 
neciuauatiliztli, neciuahuatiliztli, necihuauatiliztli
IPAspelling: 
nesiwɑːwɑtilistɬi
Alonso de Molina: 

neciuauatiliztli. casamiento de varon con muger.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 65r. col. 1. Thanks to Joe Campbell for providing the transcription.