Plural of entirety; the state of being whole, complete, or undivided in all aspects.
From Old French 'entier' meaning 'whole' or 'complete,' derived from Latin 'integrum.' The suffix '-ity' creates an abstract noun, and '-ities' makes it plural, allowing discussion of multiple complete wholes.
The plural form 'entirities' is almost never used in modern English—we say 'in their entirety' instead. It's a word that died because English speakers preferred different phrasing, showing how grammar habits can kill perfectly logical words!
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