Gaslighting is a psychological term that describes a manipulation tactic used to attain and maintain power over someone. According to the National Domestic Violence Hotline, it’s actually a form of emotional and psychological abuse. It’s also an incredibly covert and insidious one, unlike more “obvious” forms of abuse like physical violence.
The term has its roots in a 1938 British play, although was made more well-known thanks to a 1944 film adaptation titled, aptly, Gaslight. Throughout the film, a man purposefully does things to his wife to make her feel as if she’s losing her mind. He convinces her she’s stealing things, hearing noises, or only imagining that the house lights—which back then were powered by gas—are growing dimmer, when in reality they actually are growing dimmer because the man is adjusting them behind her back.
Gaslighting can happen in any type of relationship, although it’s commonly talked about in relation to intimate couples. Psychology Today notes that dictators, narcissists, and abusers use this technique frequently. The ultimate aim is to gain control over another person by making them question their self-worth and doubt their reality, which drives them to rely on the person for guidance and safety.