gaslight
vb. to manipulate another person into doubting his or her perceptions, experiences, or understanding of events. The term once referred to manipulation so extreme as to induce mental illness or to justify commitment of the gaslighted person to a psychiatric institution but is now used more generally. It is usually considered a colloquialism, though occasionally it is seen in clinical literature, referring, for example, to the manipulative tactics associated with antisocial personality disorder. —gaslighted
adj.
[from Gaslight, a 1938 stage play and two later film adaptations (1940, 1944) in which a wife is nearly driven to insanity by the deceptions of her husband]