1.strong, forceful: Pindar Ol. 9, 114 (75); Pythagoras 4, 420 (236; but Pindar only uses the form βιατας, so others).
2.using force, violent: Philo, agric. § 19. In Matthew 11:12 those are called βιασταί by whom the kingdom of God βιάζεται, i. e. who strive to obtain its privileges with the utmost eagerness and effort.
Matthew 11:12 - N-NMP GRK:βιάζεται καὶ βιασταὶ ἁρπάζουσιν αὐτήν NAS: suffers violence, and violent men take it by force. KJV: and the violent take INT: is taken by violence and [the] violent seize it