A person who practices extortion; someone who forcibly or illegally obtains money or property from others through threats or coercion.
From 'extortion' plus '-er' (agent suffix). A slightly older or more formal way of saying what 'extortionist' expresses, following the noun + -er pattern.
'Extortioner' versus 'extortionist'—English has both, but 'extortionist' is more common today, showing how language preferences shift over time.
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