Vine's Complete Expository Dictionary of Old and New Testament Words
by Vine, White and Unger.
We have not used this volume, but have used the older
New Testament Words
version. It is probably the single most useful book for someone who is just
starting to try to investigate the mean
ings of the Greek words in the text.
There is a lot of theology in some of the entries, but that can be set aside
with experience.