The word “diminish” means: to become or to cause (something) to become less in size, to make something loose it’s importance, etc.

: to lessen the authority or reputation of (someone or something) : to describe (something) as having little value or importance.

To take a way the frequent exercise of something, so that you may make it disappear or become erased from the people’s way of thinking and living.

The technique of diminishing cultural information which pertains to the different cultures were used by the system of colonization and culmination of history’s progress.