Gaslighting Explained: How to Recognize and Stop It.
Gaslighting is often misused to describe any disagreement, but true gaslighting is a form of emotional abuse. It occurs when someone makes you question your reality and sanity, like in the 1944 movie “Gas Light” where a husband manipulates his wife by dimming the lights and denying it. Here are Key Points to Know.

References:
https://www.webmd.com/mental-health/ss/slideshow-gaslighting-what-it-is-and-how-to-stop-it