alone; by oneself; single-handed
Used when someone acts or goes somewhere without companions, family, or help. Often appears in contexts like moving, traveling, or undertaking a task alone.
He was posted overseas alone.
It's difficult to try to solve the problem single-handed.
He went to America by himself, leaving his family behind.
She tackled the difficult problem all by herself.
My father is currently living alone, apart from the family.