knuckle down

(verb) to work extremely hard

Example Sentences:

A: How is school going? Are you still studying Engineering?
B: Yeah, but it’s so hard! I study for hours every day!
A: Well, just keep knuckling down. If you keep working hard, you’ll be successful one day!

The young football player is going to knuckle down by practicing every day, so he can play professionally one day.

A: You look great! How did you lose so much weight?
B: Well, I knuckle down and exercised every day.
A: Fantastic!

From the Blogs:

Back again and ready to knuckle down!

Media:

Similar idioms:

1. work one’s fingers to the bone
2. roll up one’s sleeves
3. keep one’s nose to the grindstone
4. buckle down
5. bust one’s ass
6. work like a dog
7. put one’s shoulder to the wheel
8. white knuckle
9. knock oneself out
10. pull one’s weight
11. bite off more than one can chew
12. no pain, no gain
13. have one’s ducks in a row
14. put on airs