preposition/ʃe/
to, at, in or into the home, office, etc. of; by extension, to, at or in the country of; in; among (a group of things or people of the same type); in the work of (an author or artist)
“chez moi” — at my house
Inherited from Middle French chez, from Old French chies, from Latin casa (“house”). Doublet of case. The lack of final -e may be due to contraction in unstressed position; however, it has also been explained as the continuation of a Proto-Romance dative-genitive form case (from Latin casae).