fiend
🇺🇸
/fiːnd/
🇬🇧
/fiːnd/
a person who is very cruel or unpleasant
The detective was trying to catch the fiend who had been terrorizing the town.
a person who is very interested in a particular thing
She's a fiend for gardening and spends all her free time in the garden.
an evil spirit or supernatural being
In the old legend, the fiend would appear at night and cause havoc.