1. Not worn by exposure to the weather
   "chemical weathering was beginning to attack the unweathered bedrock"

See also: new

• primero
• primeval
• primidone
• primigravida
• priming
• priming coat
• primipara
• primiparous
• unstated
• unstatesmanlike
• unsteadily
• unsteadiness
• unsteady
• unstep
• unsterilised
• unsterilized
• unstick
• unstilted
• unstimulated
• unstimulating
• unstinted
• unstinting
• unstintingly
• unstirred
• unstop