adverb
fearfully; timidly; cautiously; gingerly
Describes doing something while afraid or very carefully, often with a sense of hesitation or nervousness. Used adverbially, often with verbs of movement, touch, or speech.
彼は恐る恐るドアを開けた。
He opened the door fearfully.
恐る恐る手を伸ばして、その犬に触れた。
I gingerly reached out and touched the dog.