1. Provoking horror
   "a frightful crime of decapitation"
   - atrocious, horrifying, horrible, ugly 
2. Extreme in degree or extent or amount or impact
   "in a frightful hurry"; "spent a frightful amount of money"
   - terrible, awful, tremendous 
3. Extremely distressing
   "a frightful mistake"
   - fearful

See also: alarming, bad, extraordinary, frightfulness

Encyclopedia: Frightful

• Tasmanian devil
• Tasmanian tiger
• Tasmanian wolf
• tasse
• tassel
• tassel flower
• tassel hyacinth
• tassel-shaped
• tasseled
• tasselled
• tasset
• Tasso
• taste
• taste cell
• taste perception
• taste property
• taste sensation
• taste-maker
• taste-tester
• tastebud
• tasteful
• tastefully
• tastefulness
• tasteless
• tastelessly