"Window glass that separates the girls from the boys (6)" I have ?U?D?H and the answer must be PURDAH, but I cannot see any connection with "window glass". The closest reference I can find is to a curtain separating women from men in some religions. Thanks in advance for any information to help me understand.
Does this help?
Tinted car windows are not a hype of the 21st century, they were already used since the 11th century for the purdah, which means the seclusion of women.