Definition

Very cruel, wicked, or difficult; often used to describe something that is extremely bad or challenging.

Example

The puzzle was so fiendish that no one could solve it.

Conversation

Did you hear about that new puzzle game everyone is talking about?

Yes, I tried it, and it's quite fiendish!

I can't believe it can be that challenging.

Right? I spent hours trying to solve just one level.

Synonyms & Antonyms

Root Explanation

Fiendish → It is formed from "fiend" (from Old English "feond", meaning enemy or foe) and the suffix "-ish" (meaning having the quality of). The word "fiendish" describes something that has the qualities of an enemy, often implying wickedness or cruelty.

Memory Tip

Think of a 'fiend' as an enemy or something wicked, and the '-ish' means having the quality of that. So, fiendish helps you remember something that has the qualities of a wicked enemy.

Visually Confused Words