Wordnet 3.0
VERB (1)
1. 
 cover up a misdemeanor, fault, or error; 
- Example: "Let's not whitewash the crimes of Stalin"- Example: "She tried to gloss over her mistakes"[syn: whitewash, gloss over, sleek over, hush up]
WordNet (r) 3.0 (2006):
sleek over
    v 1: cover up a misdemeanor, fault, or error; "Let's not
         whitewash the crimes of Stalin"; "She tried to gloss over
         her mistakes" [syn: whitewash, gloss over, sleek
         over, hush up]