🇬🇧🇪🇸 fiendish - diabólico : English Lesson
adjective
Meaning of "fiendish" ("diabólico"), detailed definition, and a short video lesson below.
Fiendish means very wicked, cruel, or extremely tricky—like a super-evil villain’s plan or a puzzle that’s so hard it almost feels evil. It’s used when something seems designed to make trouble, cause chaos, or be mean on purpose.
The cat gave me a fiendish smile right before pushing my homework off the table.
The teacher’s fiendish pop quiz appeared the exact moment I forgot my brain at home.
The alarm clock’s fiendish ringing sounded like a robot chicken learning the trumpet.
Our dog has a fiendish strategy: he waits until we sit down, then loudly asks to go out.
My brother created a fiendish plan to eat everyone’s dessert by volunteering to ‘guard’ the fridge.
A boy found a fiendish box with a fiendish keyhole, a fiendish lock and a fiendish tin heart that beat. The box hissed and set a fiendish trap: fingers stuck, lid snapped. He bit his lip, pulled with all his strength, and at last the lock gave. He laughed, shaking from fear and delight.
🧑🎓 CEFR Level: C2 Proficient
This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.
Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.
