adverb
Colloquial adverb expressing that something is surprisingly or unreasonably intense, excessive, or out of the ordinary. Often carries a nuance of 'more than expected' or 'strangely'.
See also: 自棄
今日はやけに暑いね。
It's awfully hot today, isn't it?
彼はやけに静かだった。
He was strangely quiet.