恐くて

being scared, because ... is scary

→ 怖い
恐 scary, frightening + く Adverbial form + て Te-form (conjunctive form)
adjective Rare #37,360
being scared, because ... is scary This is a less common spelling of 怖くて.
JA: 一人で行くのが恐くて、母に電話した。
EN: I was scared to go alone, so I called my mother.
Forms of 怖い

彼は恐くて青くなった。

He turned pale with fear.

君は殺される夢が恐くて両親を殺したと言った

You said you killed your parents because you were afraid of dreaming that you would be killed.

— The Garden of Sinners: Paradox Spiral (2008)

彼女には恐くて話しかけたことがない。

I've never spoken to her because I'm afraid of her.