うずうず
uzūzu

Suru Verb
To-Adverb

1. itching to do something; impatient; sorely tempted; eager

Onomatopoeia
かれはそれを ためしてみたくてうずうずしていた。
karewa soreo tameshite mitakute uzūzu shite ita.
He was panting to have a go at it.
Other forms: