1. Abounding in or bordered by rocky cliffs or scarps
   "the rock-ribbed coast of Maine"
   - rockbound 
2. Tradition-bound and obstinately opinionated
   "rock-ribbed republican"
   - die-hard

See also: inflexible, rough, unsmooth

• traffic
• traffic calming
• traffic circle
• traffic control
• traffic cop
• traffic court
• traffic island
• traffic jam
• traffic lane
• traffic light
• traffic pattern
• traffic signal
• traffic warden
• trafficator
• trafficker
• tragacanth
• tragedian
• tragedienne
• tragedy
• Tragelaphus
• Tragelaphus angasi
• Tragelaphus buxtoni
• Tragelaphus eurycerus
• Tragelaphus imberbis
• Tragelaphus scriptus