hellacious /he-lāˈshəs/ (N American informal)

1. Very bad
2. Terrible
3. Enormous
4. Remarkable
5. Excellent (slang)

• twirly
• twirp
• twiscar
• twiscars
• twist
• twistable
• twist drill
• twist drills
• twisted
• twisted pair
• twisted pairs
• twister
• twisters
• twist grip
• twist grips
• twistier
• twistiest
• twisting
• twistings
• twist-off
• twistor
• twistors
• twistor theory
• twist round one's little finger
• twists