Behalf is used in phrases like “on behalf of,” meaning as a representative of someone or for their benefit. It shows that you are acting for another person or group.
“Behalf” comes from Middle English “be halve,” meaning “by side of” or “in support of.” Over time, the phrase fused into a single word with the idea of supporting or representing someone.
When you speak “on behalf of” someone, you’re literally standing by their side in language. The word shows how English often hides little preposition stories inside what now looks like a simple noun.
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