Apparently inspired by me, my friend Brian has started a series of posts on the language of Herodotus:
Herodotus had such an enormous impact that he was able to create what was essentially a new genre of writing. He was so influential that he transformed the word historia, simply meaning “inquiry,” into the name of the field of study we now call history. But at the time that he wrote, this transformation had not yet occurred, so it is probably best that we translate this word as “inquiry.”
Do check out his post, where he describes some of the dialect-related issues in studying ancient Greek. Beginning students of Greek, this would be a useful blog to follow.