English
in-law suite
From in-law + suite; from the primary users of such suites, i.e., in-laws.
Today it means
noun A division of a housing unit for use by relatives or friends of the primary residents, who would then usually share an entrance, and some shared space; but would be able to live separately, unlike boarders or roommates. There is no additional sound and fire separation as would be found in a multi-unit dwelling of separate apartments. The suite would contain at the least, sleeping, eating and bathi
Language periods are conventional ranges, not dates for this word.
Etymograph / in-law suite