yancuican niccui.

Headword: 
yancuican niccui.
Principal English Translation: 

to start or begin something (see Molina)

Alonso de Molina: 

yancuican niccui. (pret. yancuican oniccuic.) encentar algo.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 30v. col. 2. Thanks to Joe Campbell for providing the transcription.