Synonyms of brainwash
• These were lessons drilled into him by his Grandpa.
indoctrinateIf people are indoctrinated, they are taught a particular belief with the aim that they will reject other beliefs.
• They have been completely indoctrinated.
Thesaurus for brainwash from the Collins English Thesaurus
to effect a radical change in the ideas and beliefs of (a person), esp by methods based on isolation, sleeplessness, hunger, extreme discomfort, pain, and the alternation of kindness and cruelty