I. wordstudy cover sth. up/ cover up sth. to keep sth. unpleasant secret or hidden Example: The company tried unsuccessfully to keep these embarrassing pollution statistics covered up. W EW B T L E Lesson 9 - Against All Odds cover sth. up/ cover up sth.: to keep sth. unpleasant secret or hidden Example: The company tried unsuccessfully to keep these embarrassing pollution statistics covered up. I. Word Study