This is the book I generally resort to when preparing sermons. The companion volume to the Harpers Bible Comentary, this large and well-written dictionary contains any biblical word you might be looking for. With scholarly articles covering a wide variety of topics, it is one of the easiest to use but most thorough biblical reference works I have yet seen. Unlike a few Bible Dictionaries I have run across, this does not promote any particular theology. Look up a Bible passage, search for a word or phrase, find a topic in Nave's Topical Bible, or see what Matthew Henry's Commentary has to say about a passage.
Several translations are available, including the New Revised Standard Version.
You can also make use of the Blue Letter Bible tools . Look up a word or Strong's number, or get a verse or range of verses from the King James Version. And after you have your word or verse, you have one-click access to a wealth of commentaries and other material to help you understand the meaning better.