ownsome
/ˈəʊns(ə)m/pronoun (in phrase on (or by) one's ownsome) informal
All alone: it wasn’t fair to leave one chap on his ownsome...
- You appear to be spending Christmas day all on your ownsome.
- If you see me in the street and engage in conversation I will probably freeze into polite fear and smile inanely until I can get away to be on my lonely ownsome.
- You can discover these odd delights on your ownsome.
Origin
1920s: blend of own and lonesome.