the FORMAL meaning of concord is a agreement between people or peace
the GRAMMAR meaning of concord is basically the same thing but with gender, people or basically any other GRAMMATICAL that effects the form of words
Swan symbolizes grace and beauty on many levels of love, music, and poetry.
Context clues are hints that the author gives you in the story. Sometimes they help define difficult words by giving hints in the text.
I think he may be right. But I have not read the whole thing, so I may be wrong.
