congregate
Concise Oxford English Dictionary © 2008 Oxford University Press:
congregate/ˈkɒŋɡrɪɡeɪt/
▶verb gather into a crowd or mass.
– origin ME: from L. congregat-, congregare ‘collect (into a flock), unite’, from con- ‘together’ + gregare (from grex, greg- ‘a flock’).
'congregate' also found in these Oxford entries:
