ぶるっと

adverb

with a shiver; shiveringly

Onomatopoeic adverb describing a sudden, involuntary shiver or shudder, often from cold, fear, or disgust.

• 冷つめたい風かぜが吹ふいて、ぶるっと震ふるえた。

  A cold wind blew and I shivered involuntarily.