by oneself
phraseUK /baɪ wʌnˈsɛlf/
US /baɪ wʌnˈsɛlf/
Doing something alone, with no one else helping you.
She built the whole model airplane by herself.
RELATED WORDS
OTHER MEANINGS
2. Without any help from other people.
He finished the puzzle by himself.
3. When nobody else is around.
She likes to read by herself in the quiet room.
4. Relying only on your own effort.
You can learn to ride a bike by yourself.