frightfully
/ˈfraɪtfəli/
adverb
- Very; extremely (used for emphasis, often in a slightly old-fashioned or British way).
- I'm frightfully sorry for being late to the party.
- The weather was frightfully cold during our hike in the mountains.
- She looked frightfully elegant in her new evening gown.
- In a way that causes fear or terror.
- He screamed frightfully when the spider crawled onto his hand.
- The old house creaked frightfully in the wind at night.
- The storm howled frightfully, shaking the windows.
Antonyms