If this is the case then I would suspect that most if not all words have gone the same way. If this is the case, do we really know what any of the Greek words truly meant at the time of their writings?
I believe that all 9 meanings of monogenes were in use in the first century and that unique was already the principal meaning at that time. Lexicons do an excellent job of showing how words are used in Scripture most of the time.
I prefer Arndt and Gingrich for Greek and Brown, Driver, & Briggs for Hebrew. Strong's definitions are simplistic and unreliable at best!