The PCAF National Sunday School is committed to putting resources in the hands of its members! There is an awesome website for defining those words that are hard to understand in the KJV. Just go to the website and get definitions for over 11,000 KJV words.

The website is
http://www.av1611.com/kjbp

Click on KJV Dictionary at the top of the website and then click the alphabet your word starts with. Locate your word from the list and click on it to get the definition.

There are a lot of other Bible study tools to explore on the website,  as well.

Enjoy!