Word: fiendishly
Part of speech: Adverb
Syllables: fiend
ish
ly
Definition: Extremely, very.
Morphemes:
Affix: fiend
Language: en
PoS: Verb
Meaning: To yearn; to be desperate (for something).
Affix: -ish
Language: en
PoS: Suffix
Meaning: Somewhat, rather.
Affix: -ly
Language: en
PoS: Suffix
Meaning: Used to form adverbs from adjectives.