return to the drawing board

### زبان عامیانه؛
** In slang, it can mean to go back to the beginning and rethink a plan or idea that didn't work out.
** در زبان عامیانه، بازگشتن به ابتدا و بازنگری در یک برنامه یا ایده ای که موفق نبوده است.
### مترادف؛
- Start over
- Begin again
- Go back to square one
### متضاد؛
- Continue
- Proceed
- Advance
### مثال؛
1. After the prototype failed, the engineers had to return to the drawing board.
2. The marketing campaign didn't work, so we need to go back to the drawing board.
3. The project was not approved, so it's back to the drawing board for us.