Definition

In a way that causes fear or is very extreme.

Example

The storm was frightfully intense, causing widespread damage.

Conversation

Did you see that horror movie last night?

Yes, it was frightfully good, but I couldn't sleep afterward.

I know, right? The jump scares were just too much.

Totally! I was frightfully on edge the whole time.

Synonyms & Antonyms

Root Explanation

Frightfully → It is formed from "fright" (from Old English *fyrht*, meaning fear) and "-fully" (meaning in a manner full of). The word "frightfully" means in a manner full of fright or fear.

Memory Tip

Think of feeling 'fear' ('fright') and doing something 'in a manner full of' ('-fully') that fear — that's why frightfully means doing something in a fearful way.

Visually Confused Words