itsownself
pronounUK /ɪts əʊnˈsɛlf/
US /ɪts oʊnˈsɛlf/
It means a thing all by itself, with no help from anyone.
The little robot cleaned the whole room itsownself.
OTHER MEANINGS
2. Used to say a thing did something without being asked.
The door closed itsownself when the wind blew.
3. Used to show that a thing is special and unique.
That old tree has a shape all itsownself.
4. Used in some dialects to mean the same thing as 'itself'.
The cat washed itsownself after dinner.