A person or tool that removes bones from meat or fish.
From 'debone' plus the agent suffix '-er' (from Old English '-ere'), which creates nouns for things or people that perform a specific action or function.
The '-er' suffix is one of English's most versatile morphemes—'debone' becomes 'deboner,' just like 'teach' becomes 'teacher' and 'play' becomes 'player,' and it works with virtually any verb you throw at it.
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