dumb down

Translations
упрощать до абсурда
The movie was dumbed down for a younger audience.
Фильм был упрощён для более молодой аудитории.
Definitions
To simplify or reduce the complexity of something, often to the point where important details or nuances are lost, usually so that it is easier for a wider or less knowledgeable audience to understand.
Words
dumb

adjective
немой