The term "gaslighter" refers to a person who manipulates others by making them doubt their own memory, perception, or sense of reality. The structure comes from "gaslighting," derived from the play and film Gas Light, where a character is psychologically manipulated into questioning reality. It is used in informal and clinical-adjacent slang to describe persistent patterns of denial, distortion, or contradiction aimed at controlling or destabilizing another person's confidence in their own judgment.

英語での「gaslighter」の定義と意味

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