Gossip
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An interesting word in its origins. Originally it meant "Godparent" or as the Oxford English Dictionary puts it in the first definition, "One who has contracted spiritual affinity with another by acting as a sponsor at baptism." It was originally spelled "Godsibbe" and meant "God's sibling." So the OED has a citation from 1325, "He schal mi gossibbe be." It could also express a relationship to the parents of the child who is sponsored. So, in a History of Ireland in 1893, "When a man stood sponsor for a child...he became the child's Godfather and gossip to the parents."

Then the meaning extended almost immediately to a familiar acquaintance or good friend. Originally it could have meant both sexes but gradually came to mean only women and then more specifically those women friends who were invited to be present at the birth of a child. Then applied to midwives.

Then, because men thought women capable only of "idle talk" the word shifted meaning, perhaps in the 17th century, to what we think of today as gossip. A person only capable of idle talk or chatter and then meaning the talk itself, at first easy conversation and then baseless rumor.