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Whom

A word used instead of 'who' in certain grammatical contexts, often to refer to the object of a verb or preposition

Synonyms:

But by whom?And the name of the family with whom she lived.Who were those with whom I played?

The word whom originates from Middle English whom, which is a derivative of Old English hwām, hwǣm, the dative form of hwa, meaning who.

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