by oneself
ALONE, on one's own, singly, separately, solitarily, unaccompanied, companionless, unattended, unescorted, solo, unaided, unassisted, without help, by one's own efforts, under one's own steam, independently, single handed (ly), off one's own bat, on one's own initiative, by one's lonesome, on one's tod, on one's Jack Jones

[TahlilGaran] Dictionary of Contemporary English ▲

by oneself
adv. phr.
1. Without any others around; separate from others; alone.
The house stood by itself on a hill.
Tom liked to go walking by himself.
Betty felt very sad and lonely by herself.
2. Without the help of anyone else; by your own work only.
John built a flying model airplane by himself.
Lois cleaned the house all by herself.

[TahlilGaran] English Idioms Dictionary ▲