Some examples of word usage: knuckling
1. He was knuckling his sore back as he winced in pain.
2. The boxer was knuckling his opponent in the ring.
3. She was knuckling her eyes, trying to stay awake during the boring lecture.
4. The child was knuckling his eyes in an attempt to rub away the sleep.
5. He was knuckling the knots out of his tense shoulders.
6. The student was knuckling his forehead in frustration as he struggled with the math problem.
7. The athlete was knuckling his knee, trying to alleviate the pain from his recent injury.
8. She was knuckling the dirt off her shoes before entering the house.
9. The mechanic was knuckling the rust off the old car parts.
10. The chef was knuckling the dough to make it smooth and elastic for the perfect pizza crust.