Spontaneous or unconstrained will; unforced choice; (also) inclination to act without suggestion from others. Esp. in of one's (own) free will…

The state or condition of being voluntary, free, or unconstrained; absolute freedom or liberty in… Of actions.

Voluntary action; spontaneity.

The state or quality of being spontaneous.

Spontaneous, or voluntary and unconstrained, action on the part of persons; the fact of possessing this character or quality.