ぶるぶる
buruburu

Suru Verb
To-Adverb

1. trembling (with fear, anger, etc.); shivering (with cold); shaking; quivering

Onomatopoeia
しゃべり した とき かれ両手 りょうてはぶるぶる ふるえた。
shaberidashita tokikareno ryōtewa buruburu furueta.
His hands quivered when he began to speak.
Other forms: