ひやっと

adverb, noun or participle which takes 'suru'

feel a sudden chill; feel a shiver

Describes a momentary physical sensation of cold, often from a draft, cold object, or sudden temperature change. Used adverbially or with する.

• 冷つめたい風かぜが吹ふいて、ひやっとした。

  A cold wind blew and I felt a sudden chill.

• アイスを触さわったら手てがひやっとした。

  When I touched the ice, my hand felt a sudden coldness.

adverb, noun or participle which takes 'suru'

feel a sudden fright; shudder (from fear or surprise)

Describes a sudden emotional jolt—fear, horror, or surprise—that makes one's heart skip or body tense. Often used when narrowly avoiding danger or hearing shocking news.

• もう少すこしで車くるまにぶつかるところで、ひやっとした。

  I almost got hit by a car and my heart skipped a beat.

• 急きゅうに後うしろから声こえをかけられて、ひやっとした。

  Someone suddenly called out from behind me and I jumped.