CONGREGATE

I. verb (-gated; -gating) Etymology: Middle English, from Latin congregatus, past participle of congregare, from com- + greg-, grex flock Date: 15th century transitive verb to collect into a group or crowd ; assemble , intransitive verb to come together into a group, crowd, or assembly, see: gather congregator noun II. adjective Date: 1900 providing or being group services or facilities designed especially for elderly persons requiring supportive services