Understanding "Key Words" At "The Last Supper" of Lord Jesus Christ and His Disciples

 The context of the word "bag" in KJV John 13:29: 

KJV John 13:29, For some of them thought, because Judas had the bag, that Jesus had said unto him, Buy those things that we have need of against the feast; or, that he should give something to the poor. 

The word "bag" In KJV John 13:29 translates in context to mean a "money box" as my translation notes say in my King James Version (KJV) Holy Bible.

The word "against" in KJV John 13:29 means "for". 

Lastly the context of the word "sop" in KJV John 13:30. 

KJV John 13:30, He then having received the sop went immediately out: and it was night. 

The word "sop" in KJV John 13:30 according to my King James Version (KJV) Holy Bible translation notes means a "piece of bread".