da sé

Literally, "from/by oneself."

da sé

1. Used other than with a figurative or idiomatic meaning: see sé.

   allontanare il fucile da sé ― to move the rifle away from oneself

2. without the help or intervention of others; of one's own accord; by oneself
   • 2019, George Orwell, Nicola Gardini, transl., Nineteen Eighty-Four, Mondadori:

     Alla fine, ci riuscì, arrivandoci con un faticoso raggionamento: non venne da sé.

     When he did recall it, it was only by consciously reasoning out what it must be: it did not come of its own accord.

     (literally, “In the end, he succeeded, getting to it with a painstaking reasoning: it did not come of its own accord.”)