This is the 13373rd most frequent Russian word.
навредить
To harm or injure.
Here, 'навредить' is used in its base verb form to indicate causing harm intentionally or unintentionally.
Он не хотел навредить своим друзьям.
He didn't mean to harm his friends.
'навредить' here is used to describe potentially causing damage or negative consequences.
Она опасалась, что это решение может навредить её репутации.
She was afraid that this decision might harm her reputation.
In this case, 'навредить' signifies impacting something negatively, specifically the environment.