from ἐπί and τελέω; to fulfill further (or completely), i.e. execute; by implication, to terminate, undergo:--accomplish, do, finish, (make) (perfect), perform(X -ance).
from ἄρχομαι; (properly abstract) a commencement, or (concretely) chief (in various applications of order, time, place, or rank):--beginning, corner, (at the, the) first (estate), magistrate, power, principality, principle, rule.