adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
chillingly; with goosebumps; uncomfortably; restlessly
Mimetic word describing a creeping, uncomfortable sensation, often from fear, cold, or unease. Can be used adverbially with と or as a する-verb.
怖い話を聞いて、背中がぞわぞわした。
Hearing the scary story, I got goosebumps down my back.
その不気味な笑い声に、肌がぞわぞわと粟立った。
At that eerie laugh, my skin crawled with goosebumps.