Ineffable Ontological Detanglement .: Introspective Assistance & Mental Analysis Manual
Repression is what this is, however I always find it too blurry a label considering how sometimes it means something quite day to day where as sometimes it means glitching your biocomputer into the final solution.
The one you all know best is obviously memory repression, the semi-conscious alterations to the compartmentalization tell your semi-conscious this is not to be seen. Generally, we label this move pathetic, however when it happens as a child we will permit you to be pathetic. The memory is always there, it's impossible to delete a memory, even all the way to age ninety every little second you've ever experienced is still in there somewhere however it is falling under varying levels of damage and blur. Every now and then your semi-conscious will still get a glimpse of this memory, sometimes it may cause a surprised gasp seemingly out of nowhere.
The absolute deepest you can repress a memory is about ten times deeper than the average child rape victim memory represser. About half way between here and the average child rape victim memory represser, the memory will never touch your semi-conscious thinking whatsoever, however it is never possible to remove it entirely from your subconscious, not even with fully customizable compartmentalization. Your brain is never going to do this naturally, the only way to do this is an outside brainwashing.
Sometimes you're not repressing a memory, sometimes you're simply repressing knowledge. Sometimes you've kept the majority of this memory or knowledge except you have removed one key component. You may be able to look at the memory, it may seem pretty vivid, however somebody has been entirely cropped out of it. Sometimes... This means you can be in the same room as this person and make them disappear, what we call perceptual denial.
Sometimes what you have done is state dependent, what we call dissociative denial, meaning that in certain mental states the information becomes available to you and then once you enter a new mental state the information once again disappears. In the moments the information becomes available, your conscious mind always slips semi-conscious in order to take care of business. How deeply you lose your conscious depends on how deep the trauma.