to enhance the power, wealth, position, or reputation of (somebody or something)
to give a false air of greatness to (something or somebody); to praise (something or somebody) too highly
He had the fault of aggrandizing the one and disparaging the other
aggrandizement /əʹgrandizmənt/ noun
aggrandizer /ʹagrəndiezə/ noun
[French agrandiss-, stem of agrandir, from ad- + grandir to increase from Latin grandire, from grandis great, grand1]