saastuttaa

verb
  1. to contaminate or pollute, especially in reference to the environment or natural resources. verb
    Factories that release toxic chemicals into rivers saastuttaa the water supply.
    Burning fossil fuels saastuttaa the air, contributing to climate change.
  2. to corrupt or taint something, often used metaphorically to describe moral or ethical degradation. verb
    The influence of greed can saastuttaa a person's character.
    Spreading false information can saastuttaa public discourse.