adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
anxiously; impatiently; fretting
Describes a state of restless worry or impatience, often while waiting for something uncertain. Commonly used with する or と.
彼からの返事が遅くて、やきもきした。
I was fretting because his reply was late.
Not knowing the result, I'm waiting anxiously.