To interfere with the progress of
To stop or prevent passage of
The underbrush will impede the progress of the hunted animal.
I have fallen off three times already, which is starting to impede my progress.
If the reefs impede navigation they form some good harbours.
This will impede learning, essentially causing more problems than solutions.
I place my hand on the hand of the speaker so lightly as not to impede its movements.