noun
a person who has the power or authority to make decisions and judgements
verb
none
adjective
none
adverb
none
pronoun
none
preposition
none
conjunction
none
interjection
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article
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The arbiter of the dispute was called in to make a final decision.
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My brother always acts as the arbiter when my friends and I can't agree on something.
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I don't want to be the arbiter of who gets the last slice of pizza.
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In literature, the weather is often used as an arbiter of the characters' emotions.