Plural form of ferocity; multiple instances or demonstrations of extreme fierceness, violence, or cruelty.
From 'ferocity' (Latin 'ferocitas') plus the plural '-ies' ending; 'ferox' is the Latin root meaning wild or fierce.
When historians write about 'the ferocities of war,' they're using the plural to acknowledge that violence isn't one act but a relentless series of brutal events—it's a small word choice that adds weight to tragedy.
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