When did brothers and sisters become ‘siblings’?
I've never cared much for the word sibling, though I hardly knew why. The reason must be that it was introduced by a scientist, Karl Pearson, who in 1900 wrote of the “inconvenience of our language having preserved no word for either member of a pair of offspring of either or both sexes from the same parent.” So he reintroduced “a good Anglo-Saxon word,” and it stuck. It’s not quite that simple, for cultural anthropologists had, a decade earlier, adopted sib for a kindred group, apparently from the parallel German word Sippe. My aversion to sibling was merely its artificiality. We never used to use it in speech, but would say brother or sister.