Relating to or characteristic of an uncle, especially showing kind and helpful behavior toward someone younger.
From Latin 'avunculus' meaning 'uncle' (specifically maternal uncle). The word entered English in the 18th century as a formal way to describe uncle-like qualities or relationships.
The Romans had a special word for uncle because maternal uncles held unique social and legal authority—they could even inherit estates from nephews, making that relationship way more important than it is today!
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