brainwash

Short definition from Wiktionary

Noun

1. 1
   A distorting effect upon one's memory, belief, or ideas, as by propaganda.

Verb

1. 1
   To affect one's mind by using extreme mental pressure or any other mind-affecting process. (e.g. hypnosis)
2. 2
   To take from an electronically controlled machine its stored-up information; to erase a computer's programming. (1960)
3. 3
   To persuade completely and forcibly.