from עָמַם; a people (as a congregated unit); specifically, a tribe (as those of Israel); hence (collectively) troops or attendants; figuratively, a flock; folk, men, nation, people.
from בָּרָה (in the sense of cutting (like בָּרָא)); a compact (because made by passing between pieces of flesh); confederacy, (con-) feder(-ate), covenant, league.