1. Not sensitive or susceptible to impression
   "an unimpressionable mind"

Antonym: impressionable

• prosumer
• prosy
• protactinium
• protagonism
• protagonist
• protamine
• protanopia
• protanopic
• protasis
• protea
• Protea cynaroides
• protea family
• Protea mellifera
• Proteaceae
• Proteales
• protean
• protease
• protease inhibitor
• protect
• protected
• protecting
• protection
• protectionism
• protectionist
• protective