IPA: /pɜːrˈblaɪndli/
KK: /ˈpɜrˌblaɪndli/
In a way that shows a lack of understanding or awareness; blindly or without insight.
He purblindly followed the crowd without questioning their motives.
Purblindly → It is formed from "pur-" (meaning thoroughly or completely) and "blind" (from Old English "blinda", meaning unable to see). The word "purblindly" means in a manner that is completely blind or lacking in perception.
Think of being 'thoroughly' ('pur-') unable to see ('blind') — that's why purblindly means acting without clear perception.