ギクリ
gikuri

Suru Verb
To-Adverb

1. (with a) start; fright; alarm

Onomatopoeia
けいはそのいにギクリとさせられたが、頭あたまなんでもないといいたそうによこる。
kēwa sono toini gikurito saseraretaga atamao nandemo naito iitasōni yokoni furu.
Kei is startled by that question, but shakes her head as it to say that it's nothing.
Other forms: