To make yourself look nifty by using big words.

From Webster's (http://www.m-w.com/).

ag·gran·dize
1 : to make great or greater : INCREASE, ENLARGE
2 : to make appear great or greater : praise highly
3 : to enhance the power, wealth, position, or reputation of

Self`-ag*gran"dize*ment (?), n.

The aggrandizement of one's self.

 

© Webster 1913.

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