fiend:
(plural: ‘fiends‘; pronunciation: the letters ‘fie’ rhyme with the word “fee” — ‘fee.nd’)

the Fiend (imaginary picture of the Devil)
(always with a capital ‘F’) Fiend = the Devil; Satan;
an evil spirit; a demon;
a very wicked (bad) person;
a person who is addicted to something, especially addictive to drugs; a druggie,
a person who is very much interested in doing something, such as a given job;
a person who is very good at doing something,
There has always been a war between God and Fiend, and by what we see in this world, the Fiend seems to have an upper hand!
Our neighbourhood is full of wicked people who enjoy harming others, and my mother always warns us to keep a safe distance with those fiends.
Pete’s cousin is a drug fiend, and is always on the look out for someone he knows to beg for some money whenever he needs to buy drugs.
Jessica’s younger sister, Judy, is a tablet (computer) fiend who is seen with her tablet all the time.
Mike used to be a fiend with cell-phones and used to operate or fix any problems with any type of cell-phone when he was at high school, having about ten pieces in his room at any given time.

