Expresses that something is surprisingly or excessively much; often used with a negative or surprised tone.
It's oddly quiet today.
It's awfully hot today, isn't it?
He is terribly quiet.
He praised me an awful lot, which seemed suspicious.
すごく is a casual, purely positive-or-neutral intensifier, whereas いやに is more subjective and often implies that something feels off or unexpectedly extreme.
ばかに is nearly interchangeable with いやに, both expressing surprised amazement at an unusual degree, though ばかに can sound slightly more colloquial.
Rare kanji spelling; the kana form is strongly preferred.
Rare kanji spelling; the kana form is strongly preferred.
Derived from the adjective 嫌 (iya, 'unpleasant') + adverbial particle に (ni), originally meaning 'in an unpleasant manner', later shifting to an intensifier.