Arthur was locked in the Radley's house because his father thought it was a disgrace to send him away.
<u>Explanation:</u>
Arthur Radley who was also known as Boo Radley was locked up because he was involved in a crime. The crime that he had committed was that he along with his friends had stolen a car and then he had also locked up the officer in the courthouse.
Boo was locked away due to his association with "an inappropriate group"; his dad felt that Boo being placed in a reformatory would be a humiliation to the family. In any case, the fundamental explanation is a result of Mr. Radley's strict enthusiasm.
A thesaurs is a source used to look up synonyms of a word.
For eample, in the sentence, "I like bikes." you can use a thesaurus to find another word for the word "like" and say, "I enjoy bikes" or something similar to the nature!