ic nahuilhuitl semana.

(a loanword from Spanish)

ic nahuilhuitl semana.
Principal English Translation: 

Wednesday, the fourth day of the week (see Molina) (partially a loanword from Spanish, semana, week)

Orthographic Variants: 
icnauilhuitl semana, ic nauilhuitl semana
Alonso de Molina: 

icnauilhuitl semana. el miercoles. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 33r. col. 1. Thanks to Joe Campbell for providing the transcription.