Gaslighting is a psychological manipulation tactic where one person seeks to make another doubt their own perceptions, memories, or feelings. This often involves denying facts, twisting information, or presenting false narratives, leading the victim to feel confused and insecure about their reality. The term originates from the 1938 play and subsequent films titled Gas Light, where a husband manipulates his wife into thinking she is losing her sanity. The effects of gaslighting can be severe, causing emotional distress and undermining a person's self-esteem. Victims may feel isolated, anxious, or unable to trust their own judgment. Recognizing gaslighting is crucial for regaining control and seeking support from trusted friends or professionals.