LSJ is of course the standard work to see the background of NT words, but the middle ages tell us where the word in the NT was heading in terms of meaning.
From Logos:
"The sheer range that the Greek Lexicon of the Roman and Byzantine Periods covers sets it apart from virtually all other lexicons. In English, there are only two lexicons that even attempt to cover this time period. LSJM does its best to cover post-Classical Greek, but it does at times fall short for reading certain Koine or Patristic texts. This is because, though the ninth edition works to cover a larger Greek corpus, its origins as a chiefly Classical Greek lexicon regularly show through. In contrast, Sophocles' Greek Lexicon was created from the start using a larger corpus of Greek texts from its inception and thus, these challenges are far less common."
Right now it's on community pricing at $20. That's for the lexicon, but more importantly, the set also includes works on pronunciation, a grammar, and a catalog of Greek verbs.
Don't let this one pass by!
http://www.logos.com/product/8513/e-a-sophocles-collection
