fiendy
adjEtymology From Middle English feendy, fendi, equivalent to fiend + -y.
1
Like a fiend; fiendish
- He got so fiendy finally that Mrs. Ford — she's a dear if there ever was one — went up and put her arms around his neck, so as to stop him by a kiss.1915, Robert Grant, The High Priestess, page 375:
- "But the fiendiest one of all," whispers his sweet companion, "is Boiler-Room Bessie."1969, Glendon Fred Swarthout, Kathryn Swarthout, The button boat, page 127: