1. Free from admixture with noxious elements; clean
   "unpolluted streams"
   - uncontaminated

See also: pure

• intermural
• intern
• internal
• internal angle
• internal auditor
• internal auditory artery
• internal auditory vein
• internal carotid artery
• internal cerebral vein
• internal combustion
• internal control
• internal drive
• internal ear
• internal iliac artery
• internal iliac vein
• internal jugular vein
• internal maxillary artery
• internal medicine
• internal organ
• internal representation
• internal respiration
• internal revenue
• internal revenue agent
• Internal Revenue Service
• internal rhyme