IPA: /ˈoʊvərˌsteɪtmənt/
KK: /ˈoʊvərˌsteɪtmənt/
A statement that makes something seem more important or serious than it really is, often by exaggerating the truth.
His claim that he could run a marathon in under two hours was an overstatement.
Overstatement → It is formed from "over-" (meaning excessively) and "statement" (from Latin "stare", meaning to stand). The word refers to a statement that stands excessively beyond the truth or reality.
Think of something that stands 'excessively' ('over-') beyond the truth when you hear 'overstatement'.