January (see Molina); literally the first month in a year
Orthographic Variants:
iccemetztli incexiuitl
Alonso de Molina:
iccemetztli incexiuitl. el mes de enero. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 32r. col. 1. Thanks to Joe Campbell for providing the transcription.