Where does “calmecatl” come from?

calmecatl (Classical Nahuatl) comes from Classical Nahuatl calli, from Proto-Nahuan *kal-.

Ancestry of “calmecatl”, step by step

Step	Language	Word	Meaning
1	Classical Nahuatl	calli	an enclosed habitational space, a house or room;...
2	Proto-Nahuan	*kal-	—

calmecatl — Etymology, Origin & Word History | Etymology Explorer