compromising (as in incriminating or embarrassing material, whether legitimate or invented, for possible use in blackmailing, extorting or discrediting another) n. kompromat

Perhaps [Donald Trump and Melania Trump] are happy. Or perhaps each has so much kompromat on the other that they live like Mr. and Mrs. Smith, the married assassins in the Brad Pitt and Angela Jolie movie, each waiting for a chance to fire a kill shot. (Dwight Garner, “Focusing on the First Lady,” The New York Times, 06/16/2020.)

This word, when used in the above sense, can also be a synonym for incriminating, blackmail, extortion, coercion, or discrediting.