lexicon

Claude Mariottini: Professor of Old Testament, Northern Baptist Seminary points to this resource.

David Instone-Brewer at Tyndale House, Cambridge has put several lexicons available online.

David wrote:

Lexicons are at the heart of Biblical Studies, but usually we neglect them because they're cumbersome to use, and anyway our Bible software tells us what the word means. But without a real lexicon we miss so much - the nuance, context, and possible meanings. So I decided to make real lexicons easier to use. I've put them at 2letterlookup.com. These lexicons require no typing - just click on two letters and pick the word from a short list.

Well worth checking it out.