گزارش خطا در معنی کلمه 'keep one's nose to the grindstone'

1 general:: Stay hard at work, as in We expect John to get good grades again, since he really keeps his nose to the grindstone. This expression, first recorded in 1539, alludes to a tool that must be sharpened by being held to a grindstone.

2 general:: see NOSE TO THE GRINDSTONE.