Thesaurus
Synonyms & Antonyms of fiendishly
as in diabolically
Synonyms & Near Synonyms for fiendishly
- balefully,
- caddishly,
- callously,
- cruelly,
- evil-mindedly,
- felly,
- hard-heartedly,
- heartlessly,
- inhumanely,
- kindlessly,
- mercilessly,
- pitilessly,
- ruthlessly,
- soullessly,
- unfeelingly
Antonyms & Near Antonyms for fiendishly
Keep scrolling for more
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZKeep scrolling for more
Love words? Need even more definitions?
Merriam-Webster unabridged
Share fiendishly