びくびく
bikubiku

Suru Verb
no-Adjective
To-Adverb

1. being afraid of; being fearful; being timid; being nervous

Onomatopoeia
かれはびくびくしている。
karewa bikubiku shite iru.
He is afraid of his own shadow.
Suru Verb
no-Adjective
To-Adverb

2. trembling; shivering

Onomatopoeia
Other forms: