fiend [feend] /find/ Show IPA
any evil spirit; demon.
a diabolically cruel or wicked person.
Synonyms: monster, savage, brute, beast, devil.
a person or thing that causes mischief or annoyance:
Those children are little fiends.
a person who is extremely addicted to some pernicious habit:
an opium fiend.
a person who is excessively interested in some game, sport, etc.; fan; buff:
a bridge fiend.
a person who is highly skilled or gifted in something:
a fiend at languages.
verb (used without object)
Also, feen [feen] /fin/ Show IPA
to desire greatly: just another junkie fiending after his next hit;
As soon as I finish a cigarette I'm fiending to light another.
before 900; Middle English feend, Old English fēond; cognate with German Feind, Old Norse fjandr, Gothic fijands foe, orig. present participle of fijan to hate