Someone who is superior or better than another person, or who gets the better of someone.
From the adjective 'best' with the agent suffix '-er', meaning 'one who bests' (defeats or surpasses). This word structure mirrors how English creates nouns from verbs.
This uncommon word shows how English speakers can create new words by adding '-er' to almost any verb—the language is constantly evolving as speakers invent words they need.
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