IPA: /ˈblɜːr.i.ər/
KK: /ˈblɜr.i.ər/
More unclear or less distinct than something else.
The photo became blurrier after I tried to enlarge it.
Blurrier → It is formed from "blur" (of uncertain origin, possibly from Middle English *blurren*, meaning to make indistinct or unclear) and the comparative suffix "-ier" (meaning more). The word "blurrier" means more indistinct or unclear than something else.
Think of something that is becoming more unclear or indistinct — that's what blurrier means, as it describes a greater degree of blurriness.