ag-grĕgo — Lewis & Short
ag-grĕgo (adg-), āvi, ātum, 1, v. a.grex, grego. *
I To bring or add to a flock: ADGREGARE: ad gregem ducere, Paul. ex Fest. p. 23 Müll.—Hence,
II To add to something: se adgregare, to attach one's self to, to follow or adhere to (more rare than adjungere, and only in prose, but class.):
si secum suos eduxerit, et eodem ceteros naufragos adgregaverit,Cic. Cat. 1, 12:
filium eodem indicio ad patris interitum,to implicate in, id. Vatin. 10, 25:
te semper in nostrum numerum adgregare soleo,to add to, reckon among, id. Mur. 7, 16:
meam voluntatem ad summi viri dignitatem adgregāssem,had shown my zeal for the increase of his reputation, id. Fam. 1, 9: se ad eorum amicitiam, to join or ally themselves to, Caes. B. G. 6, 12; Vell. 2, 91:
oppidani adgregant se Amphotero,Curt. 4, 5; and instead of se adgregare, the pass.:
ne desciscentibus adgregarentur,Suet. Ner. 43.