accord
If you do something of your own accord, you do it freely and because you want to do it.
She knew they would leave of their own accord.
Be careful
You must use ‘own’ in sentences like these. You do not say, for example, ‘She had gone of her accord’.
You must use ‘own’ in sentences like these. You do not say, for example, ‘She had gone of her accord’.
Be careful
You also do not say that someone does something ‘on’ their own accord.
You also do not say that someone does something ‘on’ their own accord.