numskull or numbskull /numˈskul/ (informal)

A blockhead

numˈskulled adjective

• phone
• phone call
• phone calls
• phonecard
• phonecards
• 'phoned
• phoned
• phone hacking
• phone-in
• phone-ins
• phonematic
• phonematically
• phoneme
• phonemes
• phonemic
• phonemically
• phonemicisation
• phonemicise
• phonemicised
• rackers
• racket
• racketball
• racket-court
• racket-courts
• racketed