Hi
The word "στοργή" means "deep love and devotion", "affection", so it can be used to describe familial love.
Example:
"Η στοργή των γονιών είναι απαραίτητη για τη συναισθηματική ανάπτυξη των παιδιών" = The affection of parents is essential for the emotional growth of children.
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.