To intimidate (someone) emotionally or using psychology (also psych out).
To put (someone) into a required psychological frame of mind (also psych up).
To treat (someone) using psychoanalysis.
Psychiatric.
Psychedelic.
Psychology or psychiatry.
A psychologist; a psychiatrist.
Indicating that one's preceding statement was false and that one has successfully fooled one's interlocutor.
To terrify; to make someone feel extremely nervous.