IPA: /haɪˈpɜːrvɪdʒɪlənt/
KK: /haɪˈpɜrvɪdʒɪlənt/
Being extremely alert and aware of potential dangers or threats, often to an excessive degree.
After the incident, she became hypervigilant, always looking over her shoulder.
Comparative: more hypervigilant
Superlative: most hypervigilant
Hypervigilant → It is formed from "hyper-" (meaning over or excessive) and "vigilant" (from Latin "vigilans", meaning awake or watchful). The word describes a state of being excessively watchful or alert.
Think of being 'overly' ('hyper-') 'watchful' ('vigilant') — that's why hypervigilant means being extremely alert.