What is to become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. Obstinacy and willful neglects must be mastered, even though it cost blows. Locke called?

master — To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. Obstinacy and willful neglects must be mastered, even though it cost blows. Locke. (Webster's 1913.)