Pegg
Jehovah our God is One
The word "parthenos" was also, in Genesis 34, used to refer to a young woman who was most certainly NOT a virgin. It spoke of Dinah, Jacob's daughter... referring to her as a maiden after she had been raped by Shechem. She was no longer a virgin, yet the word parthenos was used.
i think you are pushing the envelope there because the point of the Dinah story was that she WAS a virgin who was raped
So the word can apply to a virgin as it can apply to a young unmarried woman...and in those days, young unmarried women were virgins. "maiden" in our culture means 'pre marriage' hence why young women loose their 'maiden' name when they get married.
The way of a man with a young woman, called "almah"... obviously a young woman, obviously not a virgin.
In the scriptures, almah has a broad meaning and can be applied to both. No matter how you look at it, Isaiah 7 can apply to either.
Some scholars even point to the word almah as coming from the hebrew root word meaning to 'conceal'...hence a concealed woman who has not uncovered herself to a man.