The children were so unruly that they had to be put in separate rooms for their afternoon naps.
Your kids are so unruly!
The unruly child will take a time out, now.
I received complaints about your unruly behaviour.
The bartender looked up. Tonight's crowd seemed a tad more unruly than normal. "Quiet down!" he called to the patrons.
No, the word 'unruly' is an adjective, a word that describes a noun. The abstract noun form of the adjective unruly is unruliness.
They told me that Jack's behavior had become increasingly unruly, that he had run around half naked, like a savage, and that he had killed two other boys. The police were worried that the large crowd of spectators might grow unruly.
When Bully’s crush spoke to him for the first time, his stunned and delighted reaction made it almost seem like she had bewitched him.
The middle school kids were unruly and the student teacher had difficulty controlling them.
When Jack scored the winning touchdown for his school’s football team, he expected his community to be happy about it, but even he was shocked to see that it was the top headline in the next day’s newspaper.
He disciplined his unruly child.
The sentence with the word 'why': Why do you ask this question?
In the sentence 'Can you give a definition for that word?', YOU is the subject.