/ ˌəʊvəˈsteɪt; NAmE ˌoʊvərˈs-/ verb
[ vn ] to say sth in a way that makes it seem more important than it really is
SYN exaggerate :
He tends to overstate his case when talking politics.
The seriousness of the crime cannot be overstated .
OPP understate
► over·state·ment / ˈəʊvəsteɪtmənt; NAmE ˈoʊvərs-/ noun [ C , U ]:
It is not an overstatement to say a crisis is imminent.