1. Causing fear or dread or terror
   "a career or vengeance so direful that London was shocked"
   - awful, dire, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible

See also: alarming, direfully

• -ible
• -iferous
• -ise
• -ish
• -ize
• -meister
• -metry
• -nomy
• -oholic
• -onym
• -opia
• -osis
• -pathy
• -phile
• -philiac
• -philous
• -phobe
• -phore
• -phyte
• -plast
• -plegia
• -ster
• -to-be
• .22 caliber
• .22 calibre