xupan.

Headword: 
xupan.
Principal English Translation: 

summer

Orthographic Variants: 
xopan
Alonso de Molina: 

xupan. verano.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 162r. col. 1. Thanks to Joe Campbell for providing the transcription.

themes: 
Time, Calendar, Frequency