The phrase "dost on own volition" can be interpreted as "doing something willingly or of one's own accord." Some synonyms for this phrase include voluntarily, independently, freely, of your own accord, and on your own initiative. These words all indicate a sense of agency or self-motivation, emphasizing that the individual is taking responsibility for their actions. Other synonyms that could be used include autonomously, off your own bat, unprompted, and unbidden. No matter which synonym is chosen, the overarching implication is that the person is taking intentional action without external influence or coercion, demonstrating their personal autonomy and decision-making abilities.