prevent or conceal
repress - restrain
To ‘repress’ means to not allow something to be expressed, such as beliefs or emotions. It can also be used to refer to the strict control of what people do, especially through the use of force. In both cases, the word implies something limiting and domineering which means that it is always used in a negative context.
David will often repress his emotions rather than tell somebody how he is really feeling. I believe that’s part of the reason he is feeling so stressed.
It had become impossible to live in that country under such a repressive regime. Every aspect of life was strictly controlled by the state.
The ongoing repression of that ethnic minority has become a cause for international concern. They are being treated with no respect or justness.