ἀγωνίζεσθαι, ἐπιζητεῖν, εὑρίσκειν καί μή εἴκειν → to strive, to seek, to find, and not to yield (Tennyson, Ulysses)
Ar. and P. ἀκρατής.
unbridled: P. and V. ἀχάλινος (Euripides, Fragment).
violent: P. and V. ἄκρατος.
disobedient: P. ἀπειθής, δυσπειθής; see unruly.