A person who puts other people into a hypnotic state (deep relaxation where they're very suggestible) for therapy or entertainment.
From 'hypnosis' (from Greek hypnos, sleep) plus '-ist' (person who does something). Hypnosis was named to sound scientific when studied in the 1800s, though 'sleep' isn't quite accurate.
Stage hypnotists make it look theatrical, but clinical hypnosis is a real therapeutic tool—your brain is still active and you can't be made to do anything against your values. It's more like focused daydreaming than sleep.
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