defile

Meanings

• a narrow pass (especially one between mountains)
• place under suspicion or cast doubt upon
• make dirty or spotty, as by exposure to air; also used metaphorically
• spot, stain, or pollute
  • "The townspeople defiled the river by emptying raw sewage into it"

Synonyms

befoul, cloud, corrupt, foul, gorge, maculate, stain, sully, taint, tarnish