IPA: /ˌoʊvərˈheɪsti/
KK: /oʊvərˈheɪsti/
Acting too quickly without thinking carefully about the consequences.
His overhasty decision led to several mistakes in the project.
Overhasty → It is formed from "over-" (meaning excessively) and "hasty" (from Old English "hæste", meaning quick or swift). The word "overhasty" means excessively quick or done too hastily.
Think of being 'excessively' ('over-') 'quick' ('hasty') — that's why overhasty means doing something too quickly.
No commonly confused words.