CONCEAL' (4 letters) The term 'cover up, essentially' can be summarized by two crossword solutions: 'LIE' (3 letters) and 'CONCEAL' (4 letters). Covering up is a form of deception, where one attempts to hide the truth or facts from others. It is often done to protect oneself or another from potential harm or embarrassment. Concealing information is a way of lying, as it involves withholding the truth.